Question

Simplify the number using the imaginary unit i.
Square root - 28

Answer 1

First, write \[\sqrt{-28}=\sqrt{-1} \sqrt{28}\]Now, can you simplify sqrt(28)?

Answer 2

the problem is i have no calculator.

Answer 3

You don't need one! You have to simplify, not approximate.
\[\sqrt{28}=\sqrt{4*7}\]Does this ring a bell?

Answer 4

that means 28 = 28

Answer 5

so the answer is i squareroot 28

Answer 6

is it multiple choice?

Answer 7

No, \[\sqrt{28}=\sqrt{4*7}=\sqrt{4}*\sqrt{7}=2\sqrt{7}\]
Because you also have \[\sqrt{-1}=i\]The answer is \[2i \sqrt{7}\]

Answer 8

Well Geckoh2o, I surely don't hope it is, otherwise you could just type it in without understanding what is going on!