Question

How do you use the graph to solve `0=3x^2+9x+5`?

Answer 1

See a solution process below:

Explanation:

We can graph this equation as:

graph{(y-3x^2-9x-5)=0 [-8, 0, -2, 2]}

The solution to this problem is for `y = 0` or the `y`-intercepts.

From the graph we can see the `y`-intercepts are at approximately:

`-2.25` and `-0.75`

graph{(y^2+(x+0.75)^2-0.025)(y^2+(x+2.25)^2-0.025)(y-3x^2-9x-5)=0 [-8, 0, -2, 2]}