Imaginary Numbers

 $\sqrt{-25}$  

• 5

• -5

• i

• 5i

 $\sqrt{-9}$  

(a)  

 $\sqrt{-19}$  

• 19i

•  $i\sqrt{19}$  

• i

• -19i

 $\sqrt{-100}$  

(a)  

Solve the following.

 $x^2+10=6$  

• 2 and -2

• 4i and -4i

• 2i and -2i

• 4 and -4

Tags

CCSS.HSA-REI.B.4B

Solve the following.

 $5x^2=-30$  

• 6i and -6i

• 6 and -6

•  $\sqrt{6}$  and  $-\sqrt{6}$  

•  $i\sqrt{6}$  and  $-i\sqrt{6}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7