Choose the best answer
1. Look! Some children are.....the buffaloes
A) piking. B) playing. C) driving. D) herding
2. Viet plays the guitar.........than phong does
A) more goodly. B) more well. C) better. D) gooder
3. Medical help is........easily obtained in remote areas than in towns
A) earlier. B) more early. C) more earlily. D) higher
4. Today Peter gets up........than he did yesterday
A) more quick. B) more quickly. C) quicklier. D) quicker
6. The win is blowing......than it did lat night
A) stronger. B) more stronly. C) stronvlier. D) more stronger

X²+xz-xy-xz/x²+xz+xy+xz

Tối giản phân thức
a) 4m²-8mn/5(2n-m)³ với m khác 2n
b) 9-(b+2)²/b²+10b+25. Với b khác -5

Thu gọn phân thức
a) a³-6a²+9a/a²-9. Với a khác cộng trừ 3

2x⁴:x²

(X³+5y²)(x²-3x²+7y³)

Thực hiện phép tính
(16x⁴y³-20x²y³-4x⁴y⁴).4x²y²

(-3x)⁴ yz mũ 5 :27x² yz²

Phân tích đa thức thành nhân tử
A) x³(2+x)² - (x+2)²+1-x³
B) x(x-y)²+y(x-y)² - xy +x²