Question

(a-b)^2+(a+2b)(a-2b)

i don't have a clue. can someone do it step by step

Answer 1

\[(a-2b)*(a+2b)= a ^{2}- (2b)^{2}\]

Answer 2

\[(a-b)^{2} = a ^{2} -2*a*b +b ^{2}\]

Answer 3

just add the two...

Answer 4

so the answe will be 2a^2-2ab-3b^2

Answer 5

or am I wrong?

Answer 6

yes,you are right ..