Question:
(a – b)2 + ____________ = a2 – b2
Solution:
(a – b)2 + (2ab – 2b2) = a2 – b2
= (a – b)2 + (2ab – 2b2)
= a2 + b2 – 2ab + 2ab – 2b2
= a2 – b2
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