Question

What is the product of `(5r-4)(r^2-6r+4)`?

Answer 1

`5r^3-34r^2+4r-16`

Explanation:

`5r^3-30r^2-20r` first step is to distribute `5r` over `r^2-6r+4`
`-4r^2+24r-16` distribute `-4` over `r^2-6r+4`
`5r^3-30r^2-20r-4r^2+24r-16` combine the two
`5r^3-34r^2+4r-16` combine like terms