Question

simplify by using identities

Answer 1

Here is your solution

Answer 2

@
8x³-(2x-y)³
=>(2x)³-(2x-y)³
using identity a³-b³
(2x-(2x-y)){(2x)²+(2x-y)²+(2x)(2x-y)}
(y)(4x²+4x²+y²-4xy-4x²y)
(y)(8x²+y²-4xy-4x²y)
@:-)