Evaluate
624x^{2}+1356
Factor
12\left(52x^{2}+113\right)
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624x^{2}+1356
Add 180 and 1176 to get 1356.
12\left(52x^{2}+113\right)
Factor out 12. Polynomial 52x^{2}+113 is not factored since it does not have any rational roots.
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