Question

How do you factor `1-(x-y)^2`?

Answer 1

`=(1-x+y)(1+x-y)`

Explanation:

Since `a^2-b^2`
`(a-b)(a+b)`
`1-(x-y)^2`
`=1^2-(x-y)^2`
`=(1-(x-y))(1+(x-y))`
`=(1-x+y)(1+x-y)`