Precalculus Examples

$f (x) = 3 x^{3} - 9 x^{2} - 9 x - 27$

Step 1

Set $3 x^{3} - 9 x^{2} - 9 x - 27$ equal to $0$ .

$3 x^{3} - 9 x^{2} - 9 x - 27 = 0$

Step 2

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

$x \approx 4.2173585$

Step 3