Упростить x²-14x+49 ÷ x²-49
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x²-17x x³
x²-14x+49 ÷ x²-49 (x-7)^2*x^3 (x-7)x^2
------------- --------= _____________ = _____________
x²-17x x³ x(x-17)(x-7)(x+7) (x-17)(x+7)