SOLUTION: Solve the equation. x(x - 3) = 40

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Question 249371: Solve the equation.
x(x - 3) = 40
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
multiply out
x(x - 3) = 40
x^2-3x-40=0
this can be factored
What are the factors of 40?
40,1
20,2
10,4
8,5
prime factors are
2,2,2,5,1
We want two numbers that add up to 3 or differ by three