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Simplify. Algebra 2

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Simplify.

−2i√−12

Which expression is equal to 2√−28√ ?

4i√7

−4i√7

4√7i

−4√7

Guest Sep 18, 2017
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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)

Jeff123  Sep 18, 2017