Factor
7x^{3}\left(9x^{4}-5x-21\right)
Evaluate
7x^{3}\left(9x^{4}-5x-21\right)
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7\left(9x^{7}-5x^{4}-21x^{3}\right)
Factor out 7.
x^{3}\left(9x^{4}-5x-21\right)
Consider 9x^{7}-5x^{4}-21x^{3}. Factor out x^{3}.
7x^{3}\left(9x^{4}-5x-21\right)
Rewrite the complete factored expression. Polynomial 9x^{4}-5x-21 is not factored since it does not have any rational roots.
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