Question

Find an expression which represents the sum of (7x-y)(7x−y) and (5x+3y)(5x+3y) in simplest terms.

Answer 1

Answer:

Hello,

Step-by-step explanation:

$(7x - y)(7x - y) + (5x+3y)(5x+3y)\\\\=(7x-y)^2+(5x+3y)^2\\=(49x^2-14xy+y^2)+(25x^2+30xy+9y^2)\\\\\boxed{=74x^2+16xy+10y^2}$