SOLUTION: If you subtracr a number from its square, the result is 12 Find all such numbers

Question 184870: If you subtracr a number from its square, the result is 12 Find all such numbers

Found 2 solutions by ankor@dixie-net.com, Earlsdon:
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
If you subtract a number from its square, the result is 12. Find all such numbers
:
x^2 - x = 12
;
x^2 - x - 12 = 0
factor
(x-4)(x+3) = 0
Two solutions
x = +4
and
x = -3
:
Check the 2nd solution
(-3)^2 - (-3) = 12
9 + 3 = 12
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Let the number be n, so...
Subtract 12 from both sides.
Factor this quadratic equation.
Apply the zero product rule.
or therefore:
or
Check:

OK!

OK!

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