# calculus

hey guys, quick question

(-8 +- sqrt -20)/-6

what does this equal

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3. 👁 78
1. and how

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posted by Karlie
2. looks like the solution to a quadratic equation, which turns out to be a complex number
remember that √-1 = i , so

(-8 +- sqrt -20)/-6

= (-8 ± 2√5 i)/-6
= (4 ± √5 i)/3

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posted by Reiny

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