factorise : [a+b] whole cube minus 8
(a + b)3 - 8 = (a + b)3 - (2)3
= (a + b - 2) [ (a + b)2 + 22 + 2(a + b)]
= (a + b - 2) (a2 + b2 + 2ab + 4 + 2a + 2b)
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factorise : [a+b] whole cube minus 8
(a + b)3 - 8 = (a + b)3 - (2)3
= (a + b - 2) [ (a + b)2 + 22 + 2(a + b)]
= (a + b - 2) (a2 + b2 + 2ab + 4 + 2a + 2b)