+0

# Ok this is a serious question

0
171
2

Ok this is a serious question

why can you not get the square root of a negative number? Plz explain

(CPhill or hecticar)

no offense to the ppls but you they make sense the best to me

Guest Mar 8, 2017
Sort:

#1
+79819
0

You can take the square root of a negative, but it's not a real number...

The square root of -1  is defined as "i"    [ "i" as in, "imaginary" ]

So, for instance

√ [ -4 ]   =  √4 *√-1  =  2 * i   =  2i

CPhill  Mar 8, 2017
#2
0

I'll start with an example. The square root of 64 is 8, so that means that 8*8 is 64. The numbers multiplied always have to be exactly the same to be a square root.

If you tried to do the square root of -48 there would be no answer because -8*-8 equals 64.

A negative times a negative, or a positive times a positive will always be positive, therefore they will never be negative.

Guest Mar 8, 2017
edited by Guest  Mar 8, 2017

### 5 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details