Simplify.

−2i√−12

Which expression is equal to 2√−28√ ?

4i√7

−4i√7

4√7i

−4√7

Guest Sep 18, 2017

#1**+1 **

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)

Jeff123
Sep 18, 2017