Evaluate
a^{2}\left(a^{2}-6\right)
Factor
a^{2}\left(a^{2}-6\right)
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a^{4}-6a^{2}
Combine -8a^{2} and 2a^{2} to get -6a^{2}.
a^{2}\left(a^{2}-6\right)
Factor out a^{2}. Polynomial a^{2}-6 is not factored since it does not have any rational roots.
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