Answer
$$\left(-4+x\right)\left(xh-3\right)$$
Work Step by Step
Factoring the expression completely, we find:
$$ xh\left(x-4\right)+3\left(4-x\right) \\ \left(-4+x\right)xh-3\left(-4+x\right) \\ \left(-4+x\right)\left(xh-3\right)$$
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