Question

How do you factor `x^2y-16y+32-2x^2`?

Answer 1

Putting the polynomial in descending order first helps:

`x^2y-16y+32-2x^2 = x^2y-2x^2-16y+32`

`=(x^2y-2x^2)-(16y-32)`

`=x^2(y-2)-16(y-2)`

`=(x-16)(y-2)`