Question

How do you solve `r-6r^2=-1`?

Answer 1

`r=-1/3` and `r=1/2`

Explanation:

`-6r^2+r+1=0` Add `1` to both sides

`(-3r-1)(2r-1)=0` Factor

`-3r-1=0`

`-3r=1` so `r=-1/3`

`2r-1=0`

`2r=1` so `r=1/2`