Question

help solve (x+4y)^2

Answer 1

well you would have x^2 +8xy+16y^2

Answer 2

shortcut way is just remember square the first term . second multiply the two terms inside brackets by itself then by 2 , then square the last term
ex 1. x^2= x^2
2 (x*4y)2 = +8xy
last (4y)^2 = +16y^2