a square + b square =
willcheckyou:
A2 + B2 = (A + B)2 - 2AB
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A2 + B2 = (A + B)2 - 2AB
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the correct answer is
a²+b²=(a+b)²-2ab
the proof
(a+b)²-2ab=a²+b²+2ab-2ab = a²+b²
a²+b²=(a+b)²-2ab
the proof
(a+b)²-2ab=a²+b²+2ab-2ab = a²+b²
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