Evaluate
15x^{2}+3
Factor
3\left(5x^{2}+1\right)
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15x^{2}+3
Multiply 3 and 5 to get 15.
3\left(5x^{2}+1\right)
Factor out 3. Polynomial 5x^{2}+1 is not factored since it does not have any rational roots.
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