3.6 quadratic equations - algebra 2

Quadratic formula

​Warm up... get ready

Multiple Choice

$$\sqrt{50}$$  

• $$5\sqrt{2}$$  

• $$\sqrt{5}$$   

• $$2\sqrt{5}$$  

• $$25\sqrt{2}$$  

Multiple Choice

$$\sqrt{45}$$  =

• $$3\sqrt{5}$$  

• $$5\sqrt{3}$$  

• $$9\sqrt{5}$$  

• $$5\sqrt{9}$$  

Multiple Choice

$$\sqrt{300}$$  

• $$3\sqrt{10}$$  

• $$2\sqrt{150}$$  

• $$100\sqrt{3}$$  

• $$10\sqrt{3}$$  

Multiple Choice

Simplify  $$\sqrt{-81}$$  

• -√81

• -9i

• 9i

• 81i

​We are going to attempt to solve for X, by completing the square.

You will be given the steps on paper. You and your partner will attempt to reorder the steps.

When you get it done, keep them in order and wait

​Activity

Multiple Choice

The discriminant is

• ax²  + bx  +  c

• b - 4ac

• b² - 4ac

• b² + 4ac

Multiple Choice

What is the discriminant of -2x² − x − 1 = 0

• 76

• -7

• 9

• none of these

Multiple Choice

What is the discriminant of this equation?

-5x² - 6 = 0

• 120

• 36

• 16

• -120