Factor
18\left(7a^{3}-25a^{2}+12\right)
Evaluate
126a^{3}-450a^{2}+216
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18\left(7a^{3}-25a^{2}+12\right)
Factor out 18. Polynomial 7a^{3}-25a^{2}+12 is not factored since it does not have any rational roots.
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