SOLUTION: Find a positive number that is 20 less than its square

SOLUTION: Find a positive number that is 20 less than its square

Algebra.Com

Question 517497: Find a positive number that is 20 less than its square
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Find a positive number that is 20 less than its square
the equation for this statement:
x = x^2 - 20
0 = x^2 - x - 20; a quadratic equation that we can factor to
(x-5)(x+4) = 0
The positive solution only
x = 5
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