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Anonymous
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x2+14x+49 = (x+7)(x+7) when factored
51.07142857142857
x=7
4x2 + 28x + 49 = 4x2 + 14x + 14x + 49 = 2x(2x + 7) + 7(2x + 7) = (2x + 7)(2x + 7) or (2x + 7)2
Yes because if x2-14x+49 then it is (x-7)(x-7) when factored