Question

Answer 1

a: \(=x\left(2x-y\right)-4\left(2x-y\right)=\left(2x-y\right)\left(x-4\right)\)

b: \(=\left(x-y\right)^2\left(x-2y\right)-y^2\left(x-2y\right)\)

\(=\left(x-2y\right)\left(x-y-y\right)\left(x-y+y\right)\)

\(=x\left(x-2y\right)^2\)

e: \(=\left(3x-y\right)\left(3x+y\right)-\left(3x-y\right)\)

\(=\left(3x-y\right)\left(3x+y-1\right)\)