Question

help me
in this question...​

Answer 1

Hello My Friend,

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Here is your answer

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Answer 2

Step-by-step explanation:

(a)= 21b -32 + 7b - 20 b

28b - 32 - 20 be

= 8 b - 32

( b )

= - z ^ 2 + 13 z ^2 - 5z + 7z ^3 - 15z

7 z^ 3+ 12z^ 2 - 20 z

( c)

= p- ( p - q) -q - ( q- p)

- q- p

I hope it help you