Question

simplify (2x-y)³-(2x+y)³​

Answer 1

Step-by-step explanation:

using identity

a³-b³=(a-b)(a²+b²+ab)

(2x-y-2x-y){(2x-y)²+(2x+y)²+(2x+y)(2x-y)}

-2y{4x²+y²-4xy+4x²+y²+4xy+4x²-2xy+2xy-y²}

-2y(12x²+y²)