Inactive Tutor answered 09/04/12
Two choices: Factor the trinomial into two binomials, set each one equal to 0, and then solve each one. Or, what I'd probably do, toss it into the quadratic formula.
In the first case, you'd end up with something like (x + anumber)(x + anothernumber) = 0 and break it into two equations:
x + anumber = 0 x + anothernumber = 0
In the second case, if you haven't covered the quadratic formula yet, you can't use it. If you have, simply refer to that section of your textbook.