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Simplify.

−2i√−12

 

 

Which expression is equal to 2√−28√ ?

 

4i√7

−4i√7

4√7i

−4√7

 Sep 18, 2017
 #1
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1. Simplify −2i√−12

 

\(-12=-1\times3\times4\)

We can move out the negative one and 4 from the square root. The square root of \(-1\) is \(i\)and the square root of \(4\)is \(2\)

 

We get -2i*i*2√3. We simplify that and get 4√3

 

2. Which expression is equal to 2√−28?

 

4i√7

−4i√7

4√7i

−4√7

 

Again, we do what we did last time.

 

-28=-1*4*7

 

We can move out the -1 and the 4 to get 2*i*2√7

 

We simplify this and get 4i√7

 

 

(note: I got tired using LaTeX)

 Sep 18, 2017

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