Answer :
(x+3y)^2
((-5)+3(-6))^2
(-5+3·6)^2
(-5+18)^2
(-5+18)(-5+18)
25-90-90+324
169 is your answer.
((-5)+3(-6))^2
(-5+3·6)^2
(-5+18)^2
(-5+18)(-5+18)
25-90-90+324
169 is your answer.
