Factor
b\left(7b+2\right)a^{2}
Evaluate
b\left(7b+2\right)a^{2}
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a^{2}b\left(12b-5b+2\right)
Factor out a^{2}b.
7b+2
Consider 12b-5b+2. Multiply and combine like terms.
a^{2}b\left(7b+2\right)
Rewrite the complete factored expression.
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