Question

I have to fill in the missing parts can somebody tell me step by step how to do it

Answer 1

a ) (x+4)2=x2 +2(4)x+16

= x2+8x+16

b) (x-6)2=x2 -12x +(6)2

= x2-12x+36

c) (x+5z)2= x2+10zx+25z2

d) ( a+3b)(a-3b) = a2-9b2