Twice the square of a certain whole number added to 3 times the number makes 90. Find d number

Assign a variable to the number. Let it be x.

"twice the square of a certain whole number"

That would be: 3x^2

"added to 3 times the number"

That would be: +3x

"makes 90"

That would be = 90

For a whole of :3x^3 + 3x = 90

Can you solve this?