Unit 4 Targets 1-7 Quiz Review

Simplify the square root completely.

√108

• 3√12

• 4√27

• 8√2

• 6√3

Simplify the square root completely.

√(-300)

• 10i√3

• 15√15

• -10√3

• 2i√13

Solve the equation using square root method.

 $\ 3x^2-9=3$  

• x = 9 or x = -9

• no solutions

• x = 2 or x = -2

• x = 81 or x = -81

Solve the equation using square root method.
 $5m^2-3=127$  

•  $\sqrt{26}$  

• 26

•  $\pm\sqrt{26}$  

•  $\pm26$  

Which equation do you use when finding the discriminant?

• aX² + bX + c

• b - 4ac

• b² - 4ac

• b² + 4ac

Find the discriminant.

-2x² − x − 1 = 0

• 76

• -7

• 9

• none of these

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• no real solutions

• one imaginary solution

Solve the equation using the quadratic formula.

-x² - 5x = -12

• None of these

• 
• 
• 

Solve using the quadratic formula.
2x² - 9x - 35 = 0

• x = 7/2, x = -6
• x = -5/2, x =5
• x = -3/7, x =6
• x = -5/2, x = 7

When completing the square

x² - 4x + 4 = 20,

what goes in the blank?

(x - __ )² = 20

• 4

• 2

• 8

• 20