Question

How do you multiply `(m+8)(m-8)`?

Answer 1

`(m+8)(m-8)=m^2-64` See explanation.

Explanation:

If you multiply this you get:

`(m+8)(m-8)= m^2cancel(+8m)cancel(-8m)-64 =m^2-64`

Answer 2

`m^2-64`

Explanation:

`(m+8)(m-8)`
`=m(m-8)+8(m-8)`
`=m^2-8m+8m-64`=>simplify:
`=m^2-64`
Alternatively the difference 2 squares formula can be used:
`a^2-b^2=(a+b)(a-b)`
hence:
`(m+8)(m-8)=m^2-64`