Question

1-a^3-b^3-3ab factorise

Answer 1

Step-by-step explanation:

1 + (- a^3) + (- b^3) - 3(1)(a)(b)

Here, the identity used is :

(a + b + c)^3 = a^3 + b^3 + c^3 - 3abc

Therefore ,

1 - a^3 - b^3 - 3ab = (1 - a - b)^3

HOPE IT HELPS U ^_^