You can put this solution on YOUR website!
Rational zeros of P(x) must be factors of 6 (with + or - signs.
Choices are: -6, -3, -2, -1, 1, 2, 3, and 6.
is a zero.
That means that
is a factor of P(x).
Dividing, we find
, the zeros of P(x) are the solutions to
That is easy to solve by "completing the square", but feel free to use the quadratic formula, if you like it better.