Final answer to the problem
$3\left(3x+4\right)\left(x+3\right)$
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Step-by-step Solution
Specify the solving method
1
Factor the polynomial $\left(3x+9\right)$ by it's greatest common factor (GCF): $3$
$3\left(3x+4\right)\left(x+3\right)$
Final answer to the problem
$3\left(3x+4\right)\left(x+3\right)$