SOLUTION: The square of a number exceeds the number by 72. Find the number

Question 927385: The square of a number exceeds the number by 72. Find the number
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
xx = x + 72
xx - x - 72 = 0
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the above quadratic equation is in standard form, with a=1, b=-1 and c=-72
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
1 -1 -72
into this solver: https://sooeet.com/math/quadratic-equation-solver.php
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the quadratic has two real roots at:
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x = 9
x = -8
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either root works fine for this problem:
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answer:
x = 9
OR
x = -8
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