SOLUTION: I am trying to answer the below question and I believe the answer is true. √-4 is not a real number.

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Question 1025701: I am trying to answer the below question and I believe the answer is true.
√-4 is not a real number.


Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28-1%29%2Asqrt%28-1%29=-1

Try starting from x%5E2=-1. If x is positive, x%5E2%3E0, which is taught and learned in introductory algebra. -1 is not positive.
If x is negative, then x%5E2%3E0, which is taught and learned in introductory algebra. -1 is not positive.

sqrt%28-1%29 is an imaginary unit, and is not "Real".

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

I am trying to answer the below question and I believe the answer is true.
√-4 is not a real number.
Yes, you're correct in that sqrt%28-+4%29 is NOT a real number. Good job!