Respuesta :

(3x-y)^4

expand the expression

(3x-y)^2x(3x-y)^2

you have to expand expressions

(9x^2-6xy+y^2)x(9x^2-6xy+y^2)

multiply what is in the parentheses.

The answer is 81x^4_108x^3y+54x12xy^3+Y^4