Evaluate
2\left(x^{2}-4x+40\right)
Factor
2\left(x^{2}-4x+40\right)
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2x^{2}-16x+8x+80
Combine x^{2} and x^{2} to get 2x^{2}.
2x^{2}-8x+80
Combine -16x and 8x to get -8x.
2x^{2}-8x+80
Multiply and combine like terms.
2\left(x^{2}-4x+40\right)
Factor out 2. Polynomial x^{2}-4x+40 is not factored since it does not have any rational roots.
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