Question

(2x-5y)whole cube-(2x-5y)whole cube

Answer 1

(2x-5y) ³-(2x-5y) ³

=> 8x³-125y±-32x5y(2c-5y)-(8x3+125y³+3*2x*5y(2x+5y))

8x³-125y³-3*2x*5y(2x-5y)-8x³-125y³-3×2x*5y(2x+5y)

=-250y³-60x²y+150xy²-60x2y-150xy²

=> -250y3-120x2y

I hope it's help you

Answer 2

subtract the formulae of both the numbers
the signs of the numbers which are on the right side of minus sign would be changed as
- to + and + to - .
solve them and their answer will be 0.