Factor
\left(3x+1\right)\left(x+y\right)
Evaluate
\left(3x+1\right)\left(x+y\right)
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3x\left(x+y\right)+x+y
Do the grouping 3x^{2}+3xy+x+y=\left(3x^{2}+3xy\right)+\left(x+y\right), and factor out 3x in 3x^{2}+3xy.
\left(x+y\right)\left(3x+1\right)
Factor out common term x+y by using distributive property.
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