Precalculus Examples

$f (x) = 8 x^{3} - 3 x^{2} + 5 x + 15$

Step 1

Set $8 x^{3} - 3 x^{2} + 5 x + 15$ equal to $0$ .

$8 x^{3} - 3 x^{2} + 5 x + 15 = 0$

Step 2

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

$x \approx - 0.97077541$

Step 3