b)\(\left(\dfrac{1}{3}-y^4\right)^2\)

= \(\dfrac{1}{9}-\dfrac{2}{3}y^4+y^8\)

c) (5x+y)²

= 25x²+10xy+y²

a) (10x+9)x-(5x-1)(2x+3)

= 10x²+9x-10x²-15x+2x+3

= -4x+3

Bài XI hoàn thành giúp mình ik

B. Choose the italics word or phrase( A,B,C or D) that needs correcting.

1. When I introduduced Tom to Bob, they were shaking hands.

       A                B                   C                         D

2. When we looked out of the window, we saw some boys and girls play in the yard.

                       A          B                                C                                      D

3. He let the letter falling onto the floor

           A                    B         C           D

III. Use the correct form of the word given to complete each sentence

1.A school outfit is no longer.... . (compel)