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Question 927079: What two numbers multiply to 192 and add up to -28?
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! xy = 192
x + y = -28
y = -28 - x
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xy = 192
x(-28 - x) = 192
-28x - xx - 192 = 0
-xx - 28x - 192 = 0
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the above quadratic equation is in standard form, with a=-1, b=-28 and c=-192
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
-1 -28 -192
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the quadratic has two real roots at:
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x = -16
x = -12
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y = -28 - x
y = -28 - -16
y = -28 + 16
y = -12
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answer:
x = -16
y = -12
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