# How do you factor x^2-3x-18?

##### 1 Answer
Aug 8, 2015

By inspection you need 2 numbers that multiply together to -18 and sum to -3. These numbers are -6 and 3. Therefore we have:

${x}^{2} - 3 x - 18 = \left(x - 6\right) \left(x + 3\right)$