3.2 Complex and Imaginary Numbers Review

Simplify:

 $\sqrt{-49}$  

•  $7$  

•  $-7$  

•  $49i$  

•  $7i$  

Simplify:

 $\sqrt{-18}$  

•  $6i$  

•  $3i\sqrt{2}$  

•  $3\sqrt{-2}$  

•  $3i$  

Simplify:

 $5\sqrt{-48}$  

•  $20\sqrt{-3}$  

•  $4i\sqrt{3}$  

•  $20i\sqrt{3}$  

•  $-20\sqrt{3i}$  

Solve the Equation: 

 $x^2=-25$  

•  $x=5,\ x=-5$  

•  $x=-5$  

•  $x=i,\ x=5$  

•  $x=5i,\ x=-5i$  

Solve the Equation: 

 $x^2+9=5$ 

•  $x=4,\ x=-4$  

•  $x=2,\ x=-2$  

•  $x=2i,\ x=-2i$  

•  $x=4i,\ x=-4i$  

Solve the Equation: 

 $\left(x-2\right)^2+25=16$ 

•  $x=2+3i,\ x=2-3i$  

•  $x=3i,\ x=-3i$  

•  $x=-2+3i,\ x=-2+3i$  

•  $x=2,\ x=3i$  

Write the expression as a complex number in standard form.



 $\left(2+i\right)+\left(3+2i\right)$  

•  $3i+5$  

•  $5+3i$  

•  $4+7i$  

•  $-1-i$  

Write the expression as a complex number in standard form.



 $\left(5+i\right)-\left(3-5i\right)$  

•  $20-8i$  

•  $8-4i$  

•  $2-3i$  

•  $2+6i$  

Write the expression as a complex number in standard form.



 $2i\left(4+i\right)$  

•  $8i+2i^2$  

•  $-2+8i$  

•  $2+8i$  

•  $8+2i$  

Write the expression as a complex number in standard form.



 $\left(1+i\right)\left(2+5i\right)$  

•  $-2+7i$  

•  $6+7i$  

•  $3+6i$  

•  $-1-4i$