Evaluate
3a\left(a+2\right)
Factor
3a\left(a+2\right)
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6a-3a^{2}+6a^{2}
Combine 2a and 4a to get 6a.
6a+3a^{2}
Combine -3a^{2} and 6a^{2} to get 3a^{2}.
a\left(6+3a\right)
Factor out a.
3a+6
Consider 2-3a+4+6a. Multiply and combine like terms.
3\left(a+2\right)
Consider 3a+6. Factor out 3.
3a\left(a+2\right)
Rewrite the complete factored expression.