Question

factorise the following x+y-1-xy​

Answer 1

Answer:

The factorisation of 1 + xy - x - y is equal to "(1 - x)(1 - y)".

Step-by-step explanation:

We have,

1 + xy - x - y

To find, the factorisation of 1 + xy - x - y = ?

∴ 1 + xy - x - y

= 1 - x - y + xy

= 1(1 - x) - y(1 - x)

= (1 - x)(1 - y)

∴ The factorisation of 1 + xy - x - y = (1 - x)(1 - y)

Thus, the factorisation of 1 + xy - x - y is equal to "(1 - x)(1 - y)".

$\color{blue}{ Answered \ by \ Srijan}$

Answer 2

xy−x+y−1

=xy+y−x−1

=(x+1)⋅y+(x+1)⋅−1

=(x+1)(y−1)