Complex numbers and roots

Express  $\sqrt{-300}$  in terms of  $i$  

•  $10\sqrt{3}$  

•  $i\sqrt{300}$  

•  $10i\sqrt{3}$  

•  $-\sqrt{300}$  

Tags

CCSS.HSN.CN.A.1

Express  $\sqrt{-225}$  in terms of  $i$  

•  $15i$  

•  $-15i$  

•  $i\sqrt{15}$  

•  $-i\sqrt{15}$  

Tags

CCSS.HSN.CN.A.1

Solve the equation $3x^2+96=0$  

•  $\pm4\sqrt{2}$  

•  $\pm4i\sqrt{2}$  

•  $2i\sqrt{4}$  

•  $\pm2\sqrt{4}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve the equation $x^2+8x+20=0$  

•  $-4\pm2i$  

•  $2i\pm4$  

•  $-2\pm4i$  

•  $3\pm2i$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Find the complex conjugate of $1-i\sqrt{2}$  

•  $i\sqrt{2}+1$  

•  $1+i\sqrt{2}$  

•  $2+i\sqrt{1}$  

•  $1+\sqrt{2}$  

Find the complex conjugate of $-2+i$ 

•  $2+i$  

•  $2-i$  

•  $i-2$  

•  $-2-i$  

A real number is an imaginary number

• Always true

• Never True

• Sometimes true

• Just true

Tags

CCSS.HSN.CN.A.1

An imaginary number is a complex number

• Always true

• Sometimes true

• Never true

• Just False

Tags

CCSS.HSN.CN.A.1

A rational number is a complex number

• Never True

• Always True

• Sometimes True

• Just False

 $f\left(x\right)=x^2-2x+17$  

•  $1\pm4i$  

•  $4\pm i$  

•  $-1\pm4i$  

•  $-4\pm i$  

Tags

CCSS.HSN.CN.A.3