Expression: $$2 x ^ { 2 } y + 9 x y + 8 x + 36$$
Do the grouping $2x^{2}y+9xy+8x+36=\left(2x^{2}y+9xy\right)+\left(8x+36\right)$, and factor out $xy$ in the first and $4$ in the second group.$$xy\left(2x+9\right)+4\left(2x+9\right)$$
Factor out common term $2x+9$ by using distributive property.$$\left(2x+9\right)\left(xy+4\right)$$