AIR MATH

Math Question

Factor \( -7 x^{3}+21 x^{2}+3 x-9 \) by grouping. What is the resulting expression? \( (3-7 x)\left(x^{2}-3\right) \) \( (7 x-3)\left(3+x^{2}\right) \) \( \left(3-7 x^{2}\right)(x-3) \) \( \left(7 x^{2}-3\right)(3+x) \)

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