### Home > CCA2 > Chapter 8 > Lesson 8.1.1 > Problem8-21

8-21.

Solve $x^{2} + 2x − 5 = 0$.

1. How many x-intercepts does $y = x^{2} + 2x − 5$ have?

You could complete the square, find the vertex, and consider the orientation to determine if this parabola has $0, 1, \text{or}\ 2$ x-intercepts.

2. Approximately where does the graph of $y = x^{2} + 2x − 5$ cross the x-axis?

$x\approx 1.45\text{ and}\ x\approx -3.45$