Evaluate
3\left(x^{2}-2550\right)
Factor
3\left(x^{2}-2550\right)
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3x^{2}-7650
Subtract 8040 from 390 to get -7650.
3\left(x^{2}-2550\right)
Factor out 3. Polynomial x^{2}-2550 is not factored since it does not have any rational roots.
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