Discriminants

The discriminant is

• ax² + bX + c

• b - 4ac

• b² - 4ac

• b² + 4ac

In the equation

y = x² + 5x + 7,

match each leading coefficient with its correct letter

• a = 0, b = 5, c = 7

• a = 1, b = 5, c = 7

• a = 7, b = 5, c = 1

In the equation

3x² + 13 = 7x

identify a, b, and C

• a = 3, b = 13, c = 7

• a = 3, b = 13, c = -7

• a = 3, b = -7, c = 13

• a = 3, b = 7, c = 13

In the equation

-5x² + 4x - 7 = 12x - 3

identify a, b, and C

• a = -5, b = -8, c = -4

• a = 5, b = -8, c = -4

• a = -5, b = 16, c = -4

• a = -5, b = 16, c = -10

What is the discriminant of y = 6x² − 2x − 3

• 76

• 29

• 68

• none of these

What is the discriminant for y = 5x² + x − 2

• -39

• 42

• -41

• 41

Find the discriminant of the equation

y = 9h² - 12h + 4

• 0

• 288

• 288

• 273

Determine the value of the discriminant for the following:

y = x² + 7x + 13

• 400

• 0

• -400

• -3

Find the discriminant of the following quadratic equation;

-2x² − x − 1 = 0

• 76

• -7

• 9

• 0

Find the discriminant of the following quadratic equation;

-x² − 6x − 11 = 0

• -263

• 80

• -8

• 0