Evaluate
a\left(2b-a\right)
Factor
a\left(2b-a\right)
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-a^{2}+3b^{2}+2ab-3b^{2}
Combine 3a^{2} and -4a^{2} to get -a^{2}.
-a^{2}+2ab
Combine 3b^{2} and -3b^{2} to get 0.
-a^{2}+2ab
Multiply and combine like terms.
a\left(-a+2b\right)
Factor out a.
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