Setting Up the Quadratic Formula

Tags

CCSS.HSA-REI.B.4B

If there are no real solutions, the discriminant is

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

What goes in the blank?

• 2

• 4

• b

• c

Tags

CCSS.HSA-REI.B.4B

For y = 4x² +8x -3, find b² - 4ac.

• 112

• 64

• –16

• 16

Tags

CCSS.HSA-REI.B.4B

For y = x² - 6x + 7, find b² - 4ac.

• 8

• -64

• 64

• 16

Tags

CCSS.HSA-REI.B.4B

Which of the following do you struggle with? (Select all that apply.)

• Setting up the quadratic formula / plugging in the numbers

• Simplifying inside the square root
  (b² - 4ac)

• Simplifying the square root
  (i.e., √50)

• Simplifying the fraction
  (i.e., 6 ± 4 /2)

• Nothing, I think I've got this!

Tags

CCSS.HSA-REI.B.4B

For y = 2x² -x -3, find b² - 4ac.

• 25

• -23

• -25

• 0

Tags

CCSS.HSA-REI.B.4B

Solve using the Quadratic Formula:
x² + 4x + 3 = 0

• x = 1 and x = 3

• x = 6 and x = -2

• x = -1 and x = -3

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

Tags

CCSS.HSA-REI.B.4B

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

• -2, 3

• 2, 3

• 2, -3

• -2, -3