CPM Homework Help : A2C Problem 11-123

After graphing $y = 12x^{3} + 55x^{2} − 27x − 10$ on a graphing calculator you can easily see that one x-intercept is $\left(−5, 0\right)$ . Use this information to find all of the $x$ -intercepts.

Hint:

This means that $\left(x + 5\right)$ is a root, so you can divide:

More Help:

Answer:

$(-5,0\,)\left(\frac{2}{3},\,0\right)\left(-\frac{1}{4},\,0\right)$