SOLUTION: In a quadratic equation, once you have something that looks like this-
-9(plus/minus)(square root) 121. Do you (plus minus) the square root of the number or the actual number?
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-> SOLUTION: In a quadratic equation, once you have something that looks like this-
-9(plus/minus)(square root) 121. Do you (plus minus) the square root of the number or the actual number?
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Question 447343: In a quadratic equation, once you have something that looks like this-
-9(plus/minus)(square root) 121. Do you (plus minus) the square root of the number or the actual number? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! In a quadratic equation, once you have something that looks like this-
-9(plus/minus)(square root) 121. Do you (plus minus) the square root of the number or the actual number?
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you add to get one value; then you subtract to get a second value
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-9 +/-sqrt(121)
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-9+sqrt(121) = -9+11 = 2
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-9-sqrt(121) = -9-11 = -20
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Cheers,
Stan H.
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