Question

Answer 1

\(a,=xy\left(2x-1\right)-4\left(2x-1\right)\\ =\left(xy-4\right)\left(2x-1\right)\\ b,=\left(2x+y\right)^2-\left(4x^2-12x+9\right)\\ =\left(2x+y\right)^2-\left(2x-3\right)^2\\ =\left(2x+y-2x+3\right)\left(2x+y+2x-3\right)\\ =\left(y+3\right)\left(4x+y-3\right)\)

Answer 2

`a, xy(2x-1) - 4(2x-1)`

`=(xy-4)(2x-1)`

`b, = (2x+y)^2 - (2x-3)^2`

`= (2x + y - 2x + 3)(2x + y + 2x - 3)`

`= (y+3)(4x+y-3)`