Question

Can some one help please? Im confused on where to begin here
Expess16x^4-96x^3y+216x^2y^2-216xy^3+81y^4 in the form (ax+by)^n

Answer 1

start at the first and the last term
the first term is 16x^4, if we have the form (ax +by)^n then, the first term should be (2x)^4
the last term is 81y^4 = (3y)^4
so, the form is (2x+3y)^4