Factor
-\frac{a\left(2a+1\right)}{4}
Evaluate
-\frac{a\left(2a+1\right)}{4}
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\frac{-a-2a^{2}}{4}
Factor out \frac{1}{4}.
a\left(-1-2a\right)
Consider -a-2a^{2}. Factor out a.
\frac{a\left(-2a-1\right)}{4}
Rewrite the complete factored expression.
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