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(x-7)(x-7) = 0
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x2 - 14x = -49 ∴ x2 - 14x + 49 = 0 ∴ (x - 7)2 = 0 ∴ x = 7
x=7
x2-14x+49 (x-7)2 or (x-7)(x-7)
Yes because if x2-14x+49 then it is (x-7)(x-7) when factored