8 m ^ { 2 } + 40 d m ^ { 2 } =
Factor
8\left(5d+1\right)m^{2}
Evaluate
8\left(5d+1\right)m^{2}
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8\left(m^{2}+5dm^{2}\right)
Factor out 8.
m^{2}\left(1+5d\right)
Consider m^{2}+5dm^{2}. Factor out m^{2}.
8m^{2}\left(5d+1\right)
Rewrite the complete factored expression.
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