Simplifying Complex numbers

(7 - 9i) + (14 - 3i)

• 21 - 12i
• 46 + 12i
• -4 - 8i
• 1- 19i

Tags

CCSS.HSN.CN.A.2

(4 + 3i)(5 + 7i)

• -1 + 43i
• 34 - 27i
• -2 + i
• 13 - 2i

Tags

CCSS.HSN.CN.A.2

Solve the quadratic equation.

 $4x^2+20=0$  

•  $\sqrt{5},\ -\sqrt{5}$  

•  $5,\ -5$  

•  $i\sqrt{5},\ -i\sqrt{5}$  

•  $i+\sqrt{5},\ i-\sqrt{5}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

 $\frac{\left(-8+4i\right)}{\left(\ 3-i\right)}$  

•  $\frac{\left(-9-3i\right)}{10}$  

•  $\frac{\left(-14+2i\right)}{5}$  

•  $\frac{\left(-12+2i\right)}{5}$  

•  $\frac{\left(-6-2i\right)}{5}$  

Tags

CCSS.HSN.CN.A.3

Simplify.

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