Precalculus Examples

$f (x) = 2 x^{3} + 9 x^{2} + 15 x - 8$

Step 1

Set $2 x^{3} + 9 x^{2} + 15 x - 8$ equal to $0$ .

$2 x^{3} + 9 x^{2} + 15 x - 8 = 0$

Step 2

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x \approx 0.41848412$

Step 3