Final answer to the problem
$16\left(a+2b\right)\left(a-3\right)$
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Step-by-step Solution
Specify the solving method
1
Factor the polynomial $\left(4a+8b\right)$ by it's greatest common factor (GCF): $4$
$4\left(a+2b\right)\left(4a-12\right)$
2
Factor the polynomial $\left(4a-12\right)$ by it's greatest common factor (GCF): $4$
$16\left(a+2b\right)\left(a-3\right)$
Final answer to the problem
$16\left(a+2b\right)\left(a-3\right)$