Precalculus Examples

$9^{x} - 3^{x + 1} + 1 = 0$

Step 1

Reorder terms.

$9^{x} + 1 - 3^{x + 1} = 0$

Step 2

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

$x \approx - 0.87603575, 0.87603575$

Step 3