Quadratic Formula/Word Problems

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

Tags

CCSS.HSA.APR.B.3

CCSS.HSA.REI.B.4

If the discriminant is zero, there will be

• one solution

• two solutions

• no solutions

If a quadratic function has a discriminant of -3,

how many solutions will it have?

• 0

• 1

• 2

• 3

If a quadratic function has a discriminant of 25,

how many solutions does it have?

• 0

• 1

• 2

• 3

Determine the value of the discriminant for the following quadratic expression

x² + 2x - 63

Remember: b² - 4ac

• 256

• -248

• 137

• 123

Find the discriminant of 8x² - 4x +5 =0

• -56

• 24

• -144

• -176

Find the discriminant of x² - 8x + 16 = 0

• 16

• 0

• -128

• 120

What is the discriminant of 6x² − 2x − 3 = 0

• 76

• 29

• 68

• none of these

Tags

CCSS.HSA.REI.B.4

Solve 8x² - 6x + 1 = 0, using the Quadratic Formula.

• No Solution

• 0.5 or 1

• 0.25 or 1

• 0.25 or 0.5

Solve 2x² + 7x - 15 = 0, using the Quadratic Formula.

• -1.5 or -5

• No Solution

• -5 or 1.5

• 1.5 or 5