Question

How do you multiply `(4r+7s)(4r+7s)`?

Answer 1

`16r^2 + 56rs + 49s^2`

Explanation:

`(4r+7s)(4r + 7s)`

Multiply out brackets using FOIL method

`16r^2 + 28rs + 28rs+ 49s^2`

add the two like terms

`16r^2 + 56rs + 49s^2`