Evaluate
m^{2}\left(9m^{2}-40\right)
Factor
m^{2}\left(9m^{2}-40\right)
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9m^{4}-40m^{2}+0
Multiply 16 and 0 to get 0.
9m^{4}-40m^{2}
Anything plus zero gives itself.
9m^{4}-40m^{2}
Multiply and combine like terms.
m^{2}\left(9m^{2}-40\right)
Factor out m^{2}. Polynomial 9m^{2}-40 is not factored since it does not have any rational roots.
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