$x.$${\left(y-x\right)}^3$ - $y.$ ${\left(x-y\right)}^2$ + xy(x - y)

• cho hàm số y=f(x)

bảng xét dấu như sau

tìm khoảng nghịch biến của hàm số y=f(2-3x)

giúp mik bài phía dưới vs

$\frac{4}{15}\times \frac{-2}{5}+\frac{4}{15}\times \frac{-3}{5}-\frac{7}{15}$

-x2 $-4x$$-6$$<$0$\forall$x

1$\frac{x}{2}$= y = $\frac{z}{3}$ và $x^2+y^2$= 125

Cho đoạn thẳng AB =8cm.O là 1 điểm thuộc 1 điểm thuộc AB . Gọi I là trung điểm của đoạn thẳng AO.K là trung điểm của đoạn thẳng OB. Tính độ dài đoạn thẳng IK

1. Maya (work) ____ since morning.

2. I (work) ____ in the garden, when he arrived.

3. I (work) ____ in the garage for three hours when John called.

4. I (write) ____ my exam this time next week.

5. They had already left by the time I (reach) ____ home.

Combine the following pairs of sentences, using relative clauses

0. I missed the train. I usually catch this train

1. He expected to pay me $2 for 12 eggs. Four of the eggs were broken

2. She climbed to the top of the Monument to see the wonderful view. She had been told about the view

3. I was given this address by a man. I met his man on a train

4. A man answered the phone. He said Tom was out

5. The bar was so noisy that I couldn't hear the person at the other and of the line. I was telephoning from this bar

6. At 6.00 thick fog descended. 6.00 was an hour before the plane was due

7. I've jist spoken to Sally. She sends you her love

8. I waited for him until 4.30. At that point I gave up

1. He expected to pay me $2 for 12 eggs. Four of the eggs were broken

2. She climbed to the top of the Monument to see the wonderful view. She had been told about the view

3. I was given this address by a man. I met his man on a train

4. A man answered the phone. He said Tom was out

5. The bar was so noisy that I couldn't hear the person at the other and of the line. I was telephoning from this bar

6. At 6.00 thick fog descended. 6.00 was an hour before the plane was due

7. I've jist spoken to Sally. She sends you her love

8. I waited for him until 4.30. At that point I gave up

x+$\frac{1}{2}$x-2 + $x^2+\frac{3}{2}$-2$x^2$

tìm x,biết 1)2x($x^2$-2)+2x(1-2x)-$x^2$=-12

a) x + 1637 = 2256
b) 8294 – x = 7329