Quadratic Equations

Solve using square roots.

• ±81

• ±9

• ±3

• No real solution

Solve by completing the square. 
 x² − 10x - 11= 0

• x = −1 and 11

• x = 1 and −11

• x = −10 and 11

• x = −5 and 25

Solve using the quadratic formula...

9x² = 4 + 7x

• 
• 
• 
• No solution

What value of c would make this a perfect sqaure trinomial?
x² +8x + c

• A. 4

• B. 16

• C. 64

• D. - 16

When factoring
x² - 4x + 4 = 20,
what goes in the blank?
(x - __ )² = 20

• 4

• 2

• 8

• 20

Which of the following is a quadratic equation?

• 25 - r² = 4r

• 2x² - 4x + 8

• 2(4x - 3) = 0

• 2y - 4x =10

Which of the following quadratic equations can be solved easily by extracting the square roots?

• x² + 7x +12 = 0

• 2w² + 7w - 3 = 0

• 3v² + 2v - 8 = 0

• 4t² - 9 = 0

Which of the following quadratic equations is equal to x (x + 3) - 5 = 0?

• x² + 3x + 5 = 0

• x² + 3x - 5 = 0

• x² - 3x - 5 = 0

• x² - 3x + 5 = 0

What is the nature of the roots of the roots of a quadratic equation if the value of its discriminant is equal to zero?

• The roots are rational and unequal

• The roots are not real

• The roots are irrational and unequal

• The roots are rational and equal