Question

4(x+y)^2-28(x^2-y^2)+49(x-y)^2

Answer 1

Hey dear!

Here is yr answer.....

= 4(x+y)²-28(x+y)+49y²

= [2(x+y)²] -2[2(x+y)](7y) +(7y)²

= [2(x+y) + 7y]²

Hope it hlpz...