A=−9x2+3y2−8xy3cap A equals negative the fraction with numerator 9 x squared plus 3 y squared minus 8 x y and denominator 3 end-fraction
𝐴=−9𝑥2+3𝑦2−8𝑥𝑦3
Đáp án
x=0x=4y+-11y2−27A9x=4y−-11y2−27A93 lines; Line 1: x equals 0; Line 2: x equals the fraction with numerator 4 y plus the square root of negative 11 y squared minus 27 cap A end-root and denominator 9 end-fraction; Line 3: x equals the fraction with numerator 4 y minus the square root of negative 11 y squared minus 27 cap A end-root and denominator 9 end-fraction end-lines;
𝑥=0𝑥=4𝑦+−11𝑦2−27𝐴√9𝑥=4𝑦−−11𝑦2−27𝐴√9
 
Bước
A⋅(-3xy)=9x3y+3xy3−8x2y2cap A center dot open paren negative 3 x y close paren equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
𝐴⋅(−3𝑥𝑦)=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
 
A⋅(-3xy)=9x3y+3xy3−8x2y2cap A center dot open paren negative 3 x modified y with boxed outline close paren equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
𝐴⋅−3𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Dùng tính giao hoán để sắp xếp lại các số hạng
A⋅(-3yx)=9x3y+3xy3−8x2y2cap A center dot open paren negative 3 modified y with boxed outline x close paren equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
𝐴⋅−3𝑦𝑥=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Bước
A⋅(-3yx)=9x3y+3xy3−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
 
A⋅(-3yx)=9x3y+3xy3−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 x cubed modified y with boxed outline plus 3 x y cubed minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Dùng tính giao hoán để sắp xếp lại các số hạng
A⋅(-3yx)=9yx3+3xy3−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 modified y with boxed outline x cubed plus 3 x y cubed minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑥𝑦3−8𝑥2𝑦2
Bước
A⋅(-3yx)=9yx3+3xy3−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 x y cubed minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑥𝑦3−8𝑥2𝑦2
 
A⋅(-3yx)=9yx3+3xy3−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 x modified y cubed with boxed outline minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑥𝑦3−8𝑥2𝑦2
Dùng tính giao hoán để sắp xếp lại các số hạng
A⋅(-3yx)=9yx3+3y3x−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 modified y cubed with boxed outline x minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑦3𝑥−8𝑥2𝑦2
Bước
A⋅(-3yx)=9yx3+3y3x−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 y cubed x minus 8 x squared y squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑦3𝑥−8𝑥2𝑦2
 
A⋅(-3yx)=9yx3+3y3x−8x2y2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 y cubed x minus 8 x squared modified y squared with boxed outline
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑦3𝑥−8𝑥2𝑦2
Dùng tính giao hoán để sắp xếp lại các số hạng
A⋅(-3yx)=9yx3+3y3x−8y2x2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 y cubed x minus 8 modified y squared with boxed outline x squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
Bước
A⋅(-3yx)=9yx3+3y3x−8y2x2cap A center dot open paren negative 3 y x close paren equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
𝐴⋅(−3𝑦𝑥)=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
 
A⋅(-3yx)=9yx3+3y3x−8y2x2cap A center dot open paren modified negative 3 with boxed outline y x close paren equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
𝐴⋅−3𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
Nhân một số dương với một số âm sẽ cho ta một số âm: (+)⋅(-)=(-)open paren + close paren center dot open paren - close paren equals open paren - close paren
(+)⋅(-)=(-)
−A⋅3yx=9yx3+3y3x−8y2x2modified negative cap A with boxed outline center dot 3 y x equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
−𝐴⋅3𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
Bước
−A⋅3yx=9yx3+3y3x−8y2x2negative cap A center dot 3 y x equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
−𝐴⋅3𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
 
−A⋅3yx=9yx3+3y3x−8y2x2modified negative cap A center dot 3 with boxed outline y x equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
−𝐴⋅3𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
Dùng tính giao hoán để sắp xếp lại các số hạng
-3Ayx=9yx3+3y3x−8y2x2modified negative 3 cap A with boxed outline y x equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
−3𝐴𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
Bước
-3Ayx=9yx3+3y3x−8y2x2negative 3 cap A y x equals 9 y x cubed plus 3 y cubed x minus 8 y squared x squared
−3𝐴𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
 
-3Ayx=9yx3+3y3x−8y2x2negative 3 cap A y x equals modified 9 y x cubed plus 3 y cubed x minus 8 y squared x squared with boxed outline
−3𝐴𝑦𝑥=9𝑦𝑥3+3𝑦3𝑥−8𝑦2𝑥2
Chuyển biểu thức bên phải sang bên trái và đổi dấu
-3Ayx−9yx3−3y3x+8y2x2=0modified negative 3 cap A y x minus 9 y x cubed minus 3 y cubed x plus 8 y squared x squared with boxed outline equals modified 0 with boxed outline
−3𝐴𝑦𝑥−9𝑦𝑥3−3𝑦3𝑥+8𝑦2𝑥2=0
Bước
-3Ayx−9yx3−3y3x+8y2x2=0negative 3 cap A y x minus 9 y x cubed minus 3 y cubed x plus 8 y squared x squared equals 0
−3𝐴𝑦𝑥−9𝑦𝑥3−3𝑦3𝑥+8𝑦2𝑥2=0
 
-3Ayx−9yx3−3y3x+8y2x2=0modified negative 3 cap A y x minus 9 y x cubed minus 3 y cubed x plus 8 y squared x squared with boxed outline equals 0
−3𝐴𝑦𝑥−9𝑦𝑥3−3𝑦3𝑥+8𝑦2𝑥2=0
Rút −yxnegative y x
−𝑦𝑥
ra làm thừa số chung
−yx⋅(3A+9x2+3y2−8yx)=0modified negative y x center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 y x close paren with boxed outline equals 0
−𝑦𝑥⋅3𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
Bước
−yx⋅(3A+9x2+3y2−8yx)=0negative y x center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 y x close paren equals 0
−𝑦𝑥⋅3𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
 
−yx⋅(3A+9x2+3y2−8yx)=0modified negative y x with boxed outline center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 y x close paren equals 0
−𝑦𝑥⋅3𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
Chia hai vế của phương trình cho −ynegative y
−𝑦
x⋅(3A+9x2+3y2−8yx)=0modified x with boxed outline center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 y x close paren equals 0
𝑥⋅3𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
Bước
x⋅(3A+9x2+3y2−8yx)=0x center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 y x close paren equals 0
𝑥⋅3𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
 
x⋅(3A+9x2+3y2−8yx)=0modified x center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 y x close paren equals 0 with boxed outline
𝑥⋅3𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
Khi tích của hai hạng tử bằng 00
0
, thì ít nhất một trong hai hạng tử đó phải bằng 00
0
 
Bước
x=03A+9x2+3y2−8yx=02 lines; Line 1: x equals 0; Line 2: 3 cap A plus 9 x squared plus 3 y squared minus 8 y x equals 0 end-lines;
𝑥=03𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
 
x=03A+9x2+3y2−8yx=02 lines; Line 1: x equals 0; Line 2: modified 3 cap A plus 9 x squared plus 3 y squared minus 8 y x equals 0 with boxed outline end-lines;
𝑥=03𝐴+9𝑥2+3𝑦2−8𝑦𝑥=0
Giải phương trình xx
𝑥
x=0x=4y+-11y2−27A9x=4y−-11y2−27A93 lines; Line 1: x equals 0; Line 2: modified x equals the fraction with numerator 4 y plus the square root of negative 11 y squared minus 27 cap A end-root and denominator 9 end-fraction with boxed outline; Line 3: modified x equals the fraction with numerator 4 y minus the square root of negative 11 y squared minus 27 cap A end-root and denominator 9 end-fraction with boxed outline end-lines;
𝑥=0𝑥=4𝑦+−11𝑦2−27𝐴√9𝑥=4𝑦−−11𝑦2−27𝐴√9
Đáp án
x=0x=4y+-11y2−27A9x=4y−-11y2−27A93 lines; Line 1: x equals 0; Line 2: x equals the fraction with numerator 4 y plus the square root of negative 11 y squared minus 27 cap A end-root and denominator 9 end-fraction; Line 3: x equals the fraction with numerator 4 y minus the square root of negative 11 y squared minus 27 cap A end-root and denominator 9 end-fraction end-lines;
𝑥=0𝑥=4𝑦+−11𝑦2−27𝐴√9𝑥=4𝑦−−11𝑦2−27𝐴√9
Đáp án
y=0y=4x+-11x2−9A3y=4x−-11x2−9A33 lines; Line 1: y equals 0; Line 2: y equals the fraction with numerator 4 x plus the square root of negative 11 x squared minus 9 cap A end-root and denominator 3 end-fraction; Line 3: y equals the fraction with numerator 4 x minus the square root of negative 11 x squared minus 9 cap A end-root and denominator 3 end-fraction end-lines;
𝑦=0𝑦=4𝑥+−11𝑥2−9𝐴√3𝑦=4𝑥−−11𝑥2−9𝐴√3
 
Bước
A⋅(-3xy)=9x3y+3xy3−8x2y2cap A center dot open paren negative 3 x y close paren equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
𝐴⋅(−3𝑥𝑦)=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
 
A⋅(-3xy)=9x3y+3xy3−8x2y2cap A center dot open paren modified negative 3 with boxed outline x y close paren equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
𝐴⋅−3𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Nhân một số dương với một số âm sẽ cho ta một số âm: (+)⋅(-)=(-)open paren + close paren center dot open paren - close paren equals open paren - close paren
(+)⋅(-)=(-)
−A⋅3xy=9x3y+3xy3−8x2y2modified negative cap A with boxed outline center dot 3 x y equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
−𝐴⋅3𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Bước
−A⋅3xy=9x3y+3xy3−8x2y2negative cap A center dot 3 x y equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
−𝐴⋅3𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
 
−A⋅3xy=9x3y+3xy3−8x2y2modified negative cap A center dot 3 with boxed outline x y equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
−𝐴⋅3𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Dùng tính giao hoán để sắp xếp lại các số hạng
-3Axy=9x3y+3xy3−8x2y2modified negative 3 cap A with boxed outline x y equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
−3𝐴𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Bước
-3Axy=9x3y+3xy3−8x2y2negative 3 cap A x y equals 9 x cubed y plus 3 x y cubed minus 8 x squared y squared
−3𝐴𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
 
-3Axy=9x3y+3xy3−8x2y2negative 3 cap A x y equals modified 9 x cubed y plus 3 x y cubed minus 8 x squared y squared with boxed outline
−3𝐴𝑥𝑦=9𝑥3𝑦+3𝑥𝑦3−8𝑥2𝑦2
Chuyển biểu thức bên phải sang bên trái và đổi dấu
-3Axy−9x3y−3xy3+8x2y2=0modified negative 3 cap A x y minus 9 x cubed y minus 3 x y cubed plus 8 x squared y squared with boxed outline equals modified 0 with boxed outline
−3𝐴𝑥𝑦−9𝑥3𝑦−3𝑥𝑦3+8𝑥2𝑦2=0
Bước
-3Axy−9x3y−3xy3+8x2y2=0negative 3 cap A x y minus 9 x cubed y minus 3 x y cubed plus 8 x squared y squared equals 0
−3𝐴𝑥𝑦−9𝑥3𝑦−3𝑥𝑦3+8𝑥2𝑦2=0
 
-3Axy−9x3y−3xy3+8x2y2=0modified negative 3 cap A x y minus 9 x cubed y minus 3 x y cubed plus 8 x squared y squared with boxed outline equals 0
−3𝐴𝑥𝑦−9𝑥3𝑦−3𝑥𝑦3+8𝑥2𝑦2=0
Rút −xynegative x y
−𝑥𝑦
ra làm thừa số chung
−xy⋅(3A+9x2+3y2−8xy)=0modified negative x y center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 x y close paren with boxed outline equals 0
−𝑥𝑦⋅3𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
Bước
−xy⋅(3A+9x2+3y2−8xy)=0negative x y center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 x y close paren equals 0
−𝑥𝑦⋅3𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
 
−xy⋅(3A+9x2+3y2−8xy)=0modified negative x y with boxed outline center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 x y close paren equals 0
−𝑥𝑦⋅3𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
Chia hai vế của phương trình cho −xnegative x
−𝑥
y⋅(3A+9x2+3y2−8xy)=0modified y with boxed outline center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 x y close paren equals 0
𝑦⋅3𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
Bước
y⋅(3A+9x2+3y2−8xy)=0y center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 x y close paren equals 0
𝑦⋅3𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
 
y⋅(3A+9x2+3y2−8xy)=0modified y center dot open paren 3 cap A plus 9 x squared plus 3 y squared minus 8 x y close paren equals 0 with boxed outline
𝑦⋅3𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
Khi tích của hai hạng tử bằng 00
0
, thì ít nhất một trong hai hạng tử đó phải bằng 00
0
 
Bước
y=03A+9x2+3y2−8xy=02 lines; Line 1: y equals 0; Line 2: 3 cap A plus 9 x squared plus 3 y squared minus 8 x y equals 0 end-lines;
𝑦=03𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
 
y=03A+9x2+3y2−8xy=02 lines; Line 1: y equals 0; Line 2: modified 3 cap A plus 9 x squared plus 3 y squared minus 8 x y equals 0 with boxed outline end-lines;
𝑦=03𝐴+9𝑥2+3𝑦2−8𝑥𝑦=0
Giải phương trình yy
𝑦
y=0y=4x+-11x2−9A3y=4x−-11x2−9A33 lines; Line 1: y equals 0; Line 2: modified y equals the fraction with numerator 4 x plus the square root of negative 11 x squared minus 9 cap A end-root and denominator 3 end-fraction with boxed outline; Line 3: modified y equals the fraction with numerator 4 x minus the square root of negative 11 x squared minus 9 cap A end-root and denominator 3 end-fraction with boxed outline end-lines;
𝑦=0𝑦=4𝑥+−11𝑥2−9𝐴√3𝑦=4𝑥−−11𝑥2−9𝐴√3
Đáp án
y=0y=4x+-11x2−9A3y=4x−-11x2−9A33 lines; Line 1: y equals 0; Line 2: y equals the fraction with numerator 4 x plus the square root of negative 11 x squared minus 9 cap A end-root and denominator 3 end-fraction; Line 3: y equals the fraction with numerator 4 x minus the square root of negative 11 x squared minus 9 cap A end-root and denominator 3 end-fraction end-lines;
𝑦=0𝑦=4𝑥+−11𝑥2−9𝐴√3𝑦=4𝑥−−11𝑥2−9𝐴√3