Question:
(a+b)2
Answer:
(a+b)2 = (a+b)(a+b)
=a(a+b)+b(a+b)
=a2 + ab + ab + b2
=a2 + b2 + 2ab
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(a+b)2 = (a+b)(a+b)
=a(a+b)+b(a+b)
=a2 + ab + ab + b2
=a2 + b2 + 2ab