Question

Factorise with this formula (x+y)^3=x^3+y^3+3xy(x+y) x^9 - y^9

Answer 1

Answer:

x4+3x2y2−3x3y−y3x+3x2y−3xy2.

Step-by-step explanation:

x(x−y)3+3xy(x−y)

x{x3+3xy2−3x2y−y3}+3x2y−3xy2

⇒x4+3x2y2−3x3y−y3x+3x2y−3xy2.