Question

Please help, What (x+y)(x-y)

Answer 1

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

Explanation:

(x+y)(x-y)

Use Foil

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

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

Combine

`x^(2)`-xy+xy-
`y^(2)`

-xy and xy cancel each other out so our final answer is

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

Answer 2

x^2-y^2

Explanation:

positive x * positive x = x^2

positive y * negative y = -y^2