Question

Factorise: a + b - a³ - b³

Answer 1

hope it helps.... thanks

Answer 2

Answer:

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

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

Hope it helps.......

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