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December 20, 2014

Homework Help: math

Posted by Anonymous on Monday, September 26, 2011 at 12:20pm.

Kahlil said that using the equation

(a + b)2 = a2 + 2ab + b2, , he can find a
similar equation for

(a − b)2 . Examine his argument. If it is correct, supply any
missing steps or justification; If it is incorrect point out why.

(a + b)2 = [a + (−b)]2
= a2 + 2a(−b) + (−b)2
= a2 − 2ab + b2
Mathematical Connections 5‐3
2. a.

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