How do you use the graph to solve #0=x^2+6x+4#?
2 Answers
See below:
Explanation:
We're looking for where the graph intersects the Xaxis (literally  we're looking for points where
So let's graph the function:
graph{x^2+6x+4 [10, 10, 5, 5]}
So where does the graph cross the xaxis? Two places:

one is between
#1 and 0# and is much closer to#1# than#0# , and 
the other is between
#5 and 6# and much closer to#5# than#6#
Explanation:
First you need to have a graph of the parabola
You can do this by working out points and plotting them.
Now compare the equation of the graph with the equation to be solved:
You will see that the two equations are the same, except that where one has
This means that we want to know what value of x will give
Use the graph to solve this....
The question is actually asking, ......
"where does the parabola intersect the
Find the values from the graph.
graph{x^2+6x+4 [7.655, 2.345, 2.69, 2.31]}