Question
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(2b - b + c)2
(2b - b + c)2
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Answer
(2b - b + c)2 = [(2a) + (-b) + (c)]2
= (2a)2 + (-b)2 + (c)2 + 2(2a)(-b) + 2(-b)(c) + 4(a)(c)
= 14a2 + b2 + c2 - 4ab - 2bc + 4ac
= (2a)2 + (-b)2 + (c)2 + 2(2a)(-b) + 2(-b)(c) + 4(a)(c)
= 14a2 + b2 + c2 - 4ab - 2bc + 4ac
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