Question

Find the cube of ( x - 2y )

Answer 1

Cube of x−2y=(x−2y)3

Using, (a−b)3=a3−b3−3ab(a−b)

=x3−(2y)3−3(x)(2y)(x−2y)

=x3−8y3−6xy(x−2y)

=x3−8y3−6x2y+12xy2

Answer 2

Hello ❤️

(x - 2y)³
ID: (a - b)³ = a³ - b³ - 3ab (a - b)

= x³ - (2y)³ - 3(x)(2y) [x - 2y]
= x³ - 8y³ - 6x (x - 2y)
= x³ - 8y³ - 6x²y + 12xy²

Hope it helps you ☺️