Question

How do you use the graph to solve `0=x^2+x-12`?

Answer 1

`x=-4` or `x=3`
See below for use of graph in determining this solution.

Explanation:

Graphing `y=x^2+x-12` (using a graphing calculator or some software)
graph{x^2+x-12 [-14.28, 14.19, -13.15, 1.09]}

We want values of `x` when `y=0`
That is we want the values of `x` where the graph crosses the X-axis.
These values can be read directly from the graph.