Final answer to the problem
$y^{3}x\left(y+1\right)$
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Step-by-step Solution
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1
Factor the polynomial $xy^4+xy^3$ by it's greatest common factor (GCF): $y^{3}x$
$y^{3}x\left(y+1\right)$
Final answer to the problem
$y^{3}x\left(y+1\right)$