Question:
(a – b) _________ = a2 – 2ab + b2
Solution:
(a – b) (a – b) = (a – b)2= a2 – 2ab + b2
(a – b) (a – b)= a × (a – b) – b × (a – b)
= a2 – ab – ba + b2
= a2 – 2ab + b2
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