Square Roots and Imaginary Numbers

Imaginary Numbers

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The Square roots of negative numbers

The Square roots of negative numbers

Simplifying negative square roots

Also called complex numbers

Multiple Choice

• 74

• 122

• 74+154i

• 122+154i

Multiple Choice

If $$\left(2+4i\right)\left(5+ki\right)=50$$  , then what is the value of $$k$$ ?

• 5

• 10

• -10

• -5

Multiple Choice

Simplify the following expression:

$$\sqrt{-3}+\sqrt{-9}+\sqrt{-16}$$  

• $$2i\sqrt{7}$$  

• $$i\sqrt{3}-i$$  

• $$i\sqrt{3}-i$$  

• $$i\sqrt{3}+7i$$  

Multiple Choice

• $$\frac{3}{8}-\frac{5i}{2}$$  

• $$\frac{3}{8}+\frac{5i}{2}$$  

• $$\frac{7}{34\ }-\frac{23i}{34}$$  

• $$\frac{7}{34}+\frac{23i}{34}$$