SOLUTION: Solve by factoring: x2 � 9x = -20

Question 113714: Solve by factoring:
x2 � 9x = -20

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation

Add 20 to both sides

Factor the left side (note: if you need help with factoring, check out this solver)

Now set each factor equal to zero:

or

or Now solve for x in each case

So our solutions are or

Notice if we graph we get

and we can see that the graph has roots at and , so this verifies our answer.

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