Question

. (5x – 7y)+ 2(5x – 7y) (9y - 4x) + (9y - 4x)2.
​

Answer 1

Answer:

this is the formula of (a+b)^2=a^2+2ab+b^2

hence by solving we get (x+2y)^2=x^2+4xy+y^2