SOLUTION: how would i find the solution set to this equation m to the second power + 9m =0

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Question 625649: how would i find the solution set to this equation m to the second power + 9m =0
Answer by reynard2007(52) About Me  (Show Source):
You can put this solution on YOUR website!

All you have to do is factor m%5E2%2B9mand you will get m%2A%28m%2B9%29=0. We now have to equate each of the factors m and m+9 to zero since if any of these two are equal to zero, the result when we multiply them is also zero.
 
Now, m+9=0 ==> m=-9 and m=0.
The solution set in roster form is {-9,0}.