Question

Multiply (a+b)and (a-b)?

Answer 1

`(a+b) (a-b)`

`=>a (a-b)+b(a-b)`

`=>a^2-ab+ab-b^2`

`=>a^2-b^2`

Answer 2

`(a+b)(a-b)`
`=a(a-b)+b(a-b)`
`=a^2-ab+ab-b^2`
`=a^2-b^2`
or
`(a+b)(a-b)=a^2-b^2`
USING THE IDENTITY OF ALGEBRA,''`(a+b)(a-b)=a^2-b^2`''