`a, 3x+6y = 3(x+2y)`
`b, 4xy-2y^2=2y(2x-y)`
`c, 6xy^2 -8x^2y = 2xy(3y-4x)`.
`d, 2(x-y)+x(x-y) = (2+x)(x-y)`
`e, x(a-2b) +2(2b-a) = (x-2)(a-2b)`.
a: \(=3\left(x+2y\right)\)
b: \(=2y\left(2x-y\right)\)
c: \(=2xy\left(3y-4x\right)\)
d: \(=\left(x-y\right)\left(2+x\right)\)
e: \(=\left(a-2b\right)\left(x-2\right)\)