SOLUTION: i need help solving the equation graphically and then checking the results algebraially {{{x^2-3x=10}}}

Question 775107: i need help solving the equation graphically and then checking the results algebraially
Answer by sofiyac(983) (Show Source): You can put this solution on YOUR website!
Thanks for posting the problem correctly!

first subtract 10 from each side of the equal sign
next pretend instead of 0 on the right side you have y
plug in a few values for x (any values) and evaluate, this will give you the matching y's. Here's the table
x | y
________
0 | -10
-2| 0
5 | 0
feel free to do more points, you need quite a few to graph a quadratic but you get the point.
Now plot these points

As you can see from the graph it crosses x axis at 5 and -2
Now to check the results plug in the solution one at a time
check for x=5

left side equals right side so x=5 is a solution
check for x=-2

left side equals right side so x=-2 is a solution
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