QUIZ FOR MATH 9

The roots of quadratic equation are -5 and 3. Which of the following quadratic equation has these roots?

• .x ² – 8x + 15=0

• x² +2x – 15 = 0

• x ² + 8x + 15 = 0

• x² -2x – 15 = 0

3x² - 5x = -4

find the discriminant

• 69

• -7

• -23

• 12

What is the value of the discriminant?

3x² - 2x - 5 = 0

• -1

• 64

• 5

• -789

If the square of a number is added to 3 times the number, the sum is 108. Find the number.

• 9, -12

• 5, -12

• 6, -12

• 8, -12

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

• The roots are not real

• The roots are irrational and not equal

• The roots are rational and not equal

• The roots are rational and equal

x² + 6x + 3 = 0

Find the roots

• -1, 8

• 7, 56

What is 1/0?

• undefined

• one

• zero

• domain

When using the formula b² - 4ac, What do you specifically find?

(ALL CAPS FOR THE ANSWER)

• 8

• 7

• 16

• 5

• 1