SOLUTION: One integer is 9 more than another. Their product is 580. Find the integers?

Question 930398: One integer is 9 more than another. Their product is 580. Find the integers?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
y = x + 9
xy = 580
x(x + 9) = 580
xx + 9x - 580 = 0
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the above quadratic equation is in standard form, with a=1, b=9 and c=-580
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
1 9 -580
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 = 20
x = -29
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the negative root doesn't fit the problem statement, so use the positive root:
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x = 20
y = x + 9
y = 20 + 9
y = 29
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answer:
x = 20
y = 29
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Solve quadratic equations, quadratic formula:
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