x(x−3)(x−7)
x(x+3)(x−7)
x(x+3)(x+7)
x(x−3)(x+7)
Correct answer is C
x−7x2−9 x x2−3xx2−49
= x−7(x−3)(x+3) x x(x−3)(x−7)(x+7)
= x(x+3)(x+7)
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