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49 = 1 x 49, 7 x 7, 49 x 1
7 x 7 x 49 x 49 x 27 = 3,176,523
49 - x2 = -(x2 -49) = - (x-7)(x+7) divide by x -7 Answer: -(x+7) = -x-7
1 x 49, 7 x 7 = 49
49 x 1/7 = 7