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→ What about going to the school cafeteria ?

What about + Ving

romantic

be + a/an + adj + N

II.

38.B

39.A

40.A

I.

35.D

36.B

37.C

Bài 6.

1.unhealthy

2.muticultural

3.mountainous

4.communal

5.socialise

Bài 7.

1.about

2.for

3.on

4.in - in

5.for

6.at

7.of

8.to

9.for

10.of 

(x - y²)²

= x² - 2xy² + (y²)²

= x² - 2xy² +  y⁴

(x\(^2\) - y\(^2\))\(^2\) 

= (x²)² - 2x²y² + (y²)²

= x⁴ - 2x²y² + y⁴

(2x + 3y)\(^2\) + 2(2x + 3y) + 1

= (2x + 3y + 1)\(^2\)

AD HĐT : (a + b)\(^2\) = a\(^2\) + 2ab + b\(^2\)

(x³ + 2y²)²

= (x³)² + 2.x³.2y² + (2y²)²

= x⁶ + 4x³y² + 4y⁴