Intro to Imaginary Numbers

Intro to Imaginary Numbers

I can solve quadratic equations using square roots and imaginary numbers

​Solve the following quadratic equation.

​Solve the following quadratic equation.

Multiple Choice

Solve the following quadratic equation.

$$k^2+5=41$$  

• 2, -2

• 4, -4

• 6, -6

• 2

Multiple Choice

Solve the following quadratic equation.

$$n^2-6=19$$  

• 8, -8

• 13, -13

• 5, -5

• 62, -62

​Solve the following quadratic equation.

​Solve the following quadratic equation.

Multiple Choice

Solve the following quadratic equation.

$$n^2+5=-1$$  

• $$i\ \sqrt[]{6}$$  

• $$-54,\ 54$$  

• $$i\ \sqrt[]{6},\ -i\ \sqrt[]{6}$$  

• $$3i\ \sqrt[]{6},\ -3i\ \sqrt[]{6}$$  

Multiple Choice

Solve the following quadratic equation.

$$-4n^2=112$$  

• $$-28,\ 28$$  

• $$2i\ \sqrt[]{7},\ -2i\ \sqrt[]{7}$$  

• $$i\ \sqrt[]{23},\ -i\ \sqrt[]{23}$$  

• $$i\ \sqrt[]{23}$$  

Multiple Choice

Solve the following quadratic equation.

$$b^2-1=-19$$  

• $$i\ \sqrt[]{6},\ -i\ \sqrt[]{6}$$  

• $$2i\ \sqrt[]{5},\ -2i\ \sqrt[]{5}$$  

• $$3i\ \sqrt[]{2},\ -3i\ \sqrt[]{2}$$  

• $$-20,\ 20$$  

​Go to student.desmos.com and complete the activity "Practice: Intro to Complex Numbers"