Quadratic Formula & The Discriminant

The discriminant is

• ax² + bx + c

• b - 4ac

• b² - 4ac

• b² + 4ac

Tags

TEKS.MATH.A.8A

Determine the value of the discriminant and describe the number and type roots for the following:

x² + 7x + 13

• 101; 2 real roots

• 3; 2 real roots

• -101; 2 imaginary roots

• -3; 2 imaginary roots

Tags

TEKS.MATH.A.8A

Use the quadratic formula to solve 2x² + 2x - 12.

• x = -2, 3

• x = 2, 3

• x = 2, -3

• x = -2, -3

Tags

TEKS.MATH.A.8A

If the discriminant is negative, then the quadratic has:

• 1 Real Solution

• 2 Real Solutions

• Half a Solution

• 2 Complex (imaginary) Solutions

Tags

TEKS.MATH.A.8A

The quadratic equation can be used to solve quadratic equations that can or cannot be factored.

• True

• False

Tags

TEKS.MATH.A.8A

Solve using the Quadratic Formula.

• A

• B

• C

• D

Tags

TEKS.MATH.A.8A

Solve using the quadratic formula: f(x) = 2x² - 4x + 7

• x = (2 ± 2i√10)/2

• x = (4 ± √40)/4

• x = (2 ± i√10)√/2

• x = (2 ± 2i√40)/4

Tags

TEKS.MATH.A.8A

If the discriminant is equal to 0, how many solutions are there?

• No solutions

• 1 Solution

• 2 Solutions

• Infinite solutions

Tags

CCSS.HSA-REI.B.4B

If the discriminant is equal to 4, how many solutions are there?

• No Solutions

• 1 Solution

• 2 Solutions

• Infinite Solutions

Tags

CCSS.HSA-REI.B.4B

Solve using the Quadratic Formula.

• A

• B

• C

• D

Tags

TEKS.MATH.A.8A