Quadratic Formula and Discriminant Review

The discriminant is

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

Tags

CCSS.HSA-REI.B.4B

A function has a discriminant of -3.

______________

How many solutions does it have?

• 0

• 1 Real

• 2 Real

• 2 Complex

Tags

CCSS.HSA-REI.B.4B

A function has a discriminant of 25.

______________

How many solutions does it have?

• 2 Complex

• 1 Real

• 2 Real

• 5 Real

Tags

CCSS.HSA-REI.B.4B

Find the discriminant of the following equation. (Hint: make =0 first!)
3x² -x + 3 = 5

• 5
• 25
• -24
• -26

Tags

CCSS.HSA-REI.B.4B

Determine the value of the discriminant and how many solutions the equation has.
x² + 2x - 63 = 0

• 256, 2 real solutions
• -256, 0 real solutions
• 137, 2 real solutions
• 123, 2 real solutions

Tags

CCSS.HSA-REI.B.4B

Determine the value of the discriminant and how many solutions the equation has.

x² + 7x + 13 = 0

• 400, 2 real solutions

• -3, 2 real solution

• -400, 0 real solutions

• -3, 2 complex solutions

Tags

CCSS.HSA-REI.B.4B

Solve    2x² + 7x - 15 = 0

• -1.5 or 5
• No Solution
• -5 or 1.5
• 0.7 or 5

Tags

CCSS.HSA-REI.B.4B

Solve     8x² - 6x + 1 = 0

• No Solution
• 0 or 1
• -0.5 or -0.25
• 0.25 or 0.5

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula (Hint: make =0 first!)
 x² + 4x - 40 = -8

• -10 & -4
• -4 & 10
• -8 & 4
• 8 & -4

Tags

CCSS.HSA-REI.B.4B

Solve using the Quadratic Formula (Make =0 first!):
2x² + x  = 4

• x = -¼ and  x = -2
• x = 1.19 and x = -1.69
• x = 8  and x = -4

Tags

CCSS.HSA-REI.B.4B