Evaluate
64-2x^{2}
Factor
2\left(32-x^{2}\right)
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0x^{4}-2x^{2}+64
Multiply 0 and 1 to get 0.
0-2x^{2}+64
Anything times zero gives zero.
64-2x^{2}
Add 0 and 64 to get 64.
2\left(0-x^{2}+32\right)
Factor out 2. Polynomial -x^{2}+32 is not factored since it does not have any rational roots.
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