Question

How do you factor `ax - ay - x² + 2xy - y²`?

Answer 1

`(x-y)(a-x+y)`

Explanation:

`ax-ay-x^2+2xy-y^2`
`=a(x-y)-(x^2-2xy+y^2)`
`=a(x-y)-(x-y)^2`
`=(x-y)(a-x+y)`