Verified Answer :

We have to simplify:
√ ( - 28 )
We know that √ (-1 ) = i ( the imaginary unit )
√ ( - 28 ) = √ 28 ( - 1 ) = i √ ( 28 ) = i √ ( 4 7 ) = 2 i √( 7 )
But there is not such solution among the options.
Only correct answer ( using the imaginary unit ) is:
C. i (square root) 28
 

Answer:

CONNEXUS: Lesson 7 Unit 5 Complex Numbers ANSWERSS!


Step-by-step explanation:

Just took the quiz and i have all the answers so here you go  


1) D: 2i(square root)7


2)B:second graph (4,2)


3)B:11-2i


4)C: 20-4i


5)A:31+i/26


6)C: 1(plus or minus) i(square root)11