Question

a-(2a+3)²
b-(2+9x)²
c-(6x-y)²
d-(a-2b)²
e-(x-5)(x+5)
f-(7a+1)(7a-1)
g-(mn)²
h-(9y-4)(9y+4)
i-(10a-bc)(10a+bc)
j-(x²+2a)²​

Answer 1

a-(2a+3)²=4a²+12a+9

b-(2+9x)²=4+36x+81x²

c-(6x-y)²=36x²-12xy+y²

d-(a-2b)²=a²-4ab+4b²

e-(x-5)(x+5)=x²-25

f-(7a+1)(7a-1)=49a²-1

g-(mn)²=m²n²

h-(9y-4)(9y+4)=81y²-16

i-(10a-bc)(10a+bc)=100a²-b²c²

j-(x²+2a)²=x⁴+4ax²+4a²