Asked by Anonymous

How to tell how many solutions c^2 - 18 = 9 in mental math?
Answered by Steve
a quadratic always has two solutions.
Answered by Anonymous
The answer key says 3+-square root 3
Answered by Steve
I think you mean

±3√3

The two solutions are √27 and -√27

But, √27 = √(9*3) = √9√3 = 3√3
Answered by Anonymous
Oh, okay. Thanks!
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