Algebra Homework Help : Expansion of (a ± b)2
How to Expand (a ± b)2 ?(a + b)2 = (a + b)(a + b) = a(a + b) + b(a + b) = a2 + ab + ba + b2 = a2 + 2ab + b2
(a − b)2 = (a − b)(a − b) = a(a − b) − b(a − b) = a2 − ab − ba + b2 = a2 − 2ab + b2 Practice Exercise for Algebra Module on Expansion of (a ± b)2
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