SOLUTION: For some reason, they're using a question mark to indicate the plus/minus symbol. That's because the solutions to the quadratic are: -1+2i and -1-2i Use the quadratic for

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Question 71202: For some reason, they're using a question mark to indicate the plus/minus symbol.
That's because the solutions to the quadratic are:
-1+2i and -1-2i
Use the quadratic formula to find them.

Answer by galactus(183)   (Show Source): You can put this solution on YOUR website!

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