\(a,=a\left(x+y\right)+2\left(x+y\right)=\left(a+2\right)\left(x+y\right)\\ b,=x\left(x+y\right)-5\left(x+y\right)=\left(x-5\right)\left(x+y\right)\\ c,=2x\left(x-3y\right)+5\left(x-3y\right)=\left(2x+5\right)\left(x-3y\right)\\ d,=x\left(x-y\right)-2\left(x-y\right)=\left(x-2\right)\left(x-y\right)\)

