Question

factorise a - b - a3 + b3​

Answer 1

a-b-a^3+b^3

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

=(a - b) - [(a - b)^3 + 3ab(a - b)]

=(a - b ) {1 - (a^2 - 2ab + b^2) + 3ab]

=(a - b) (1 - a^2 + 2ab - b^2 + 3ab)

=(a - b) (1 - a^2 - b^2 + 5ab)

I hope this may help you...