Alg3.4.11
From Exampleproblems
Solution:
![\displaystyle 4a^2 + 4ab + b^2 - c^2 = [(2a)^2 + (2a)b+b^2] -c^2= (2a+b)^2 - c^2 = (2a+b -c)(2a+b+c)](/wiki/images/math/3/5/0/3509a801b1a8be7e04bb7bbb1aab3f02.png)
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