Question

3r^2+27
`3r { +}^(2) + 27 = 0`

Answer 1

For this case we have the following:

`3r^2+27=0`

We can subtract 27 in both sides and we got:

`3r^2=-27`

Then we can divide both sides by 3 and we got:

`r^2=-9`

Then the possible to solution are:

`r=3i,r=-3i`