SOLUTION: Find a number whose square is 168 greater than 2 times the number

Question 936713: Find a number whose square is 168 greater than 2 times the number
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
xx = 2x + 168
xx - 2x - 168 = 0
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the above quadratic equation is in standard form, with a=1, b=-2 and c=-168
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
1 -2 -168
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 = 14
x = -12
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answer:
14 or -12
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