## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$$x=-4,1$$
To solve an equation set equal to zero using a graph, we see where the graph intersects the x-axis. Thus, we can use the reverse method, solving the equation by setting it equal to zero to see what the x-intercepts are. Doing this, we find: $$0=x^2+3x-4 \\ 0=(x+4)(x-1) \\ x=-4,1$$