SOLUTION: Find a number so that the square of the number is 28 more than three times the number. Thank you

Question 292167: Find a number so that the square of the number is 28 more than three times the number. Thank you
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Let n = the required number, then:
Rearrange into the standard form for a quadratic equation.
Factor this quadratic equation.
Apply the "zero product" rule.
or so that...
or
So there are two answers to this problem. Let's check them both:
Substitute n = -4.

OK for n = -3.
Substitute n = 7.

OK for n = 7.
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