The Quadratic Formula

What is this formula?

• This is the speed of light formula.
• This is the quadratic formula.
• This is the zero product property.
• This is scary.

Tags

CCSS.HSA-REI.B.4B

The quadratic equation, when solved, generates two answers. 

• True
• False

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

• True
• False

What is the following called? b²- 4ac

• Axis of symmetry
• Quadratic Formula
• Vertex
• Discriminant

Tags

CCSS.HSA-REI.B.4B

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x = 3
*remember right side should =0

• a = 4, b = -8, c = 3
• a = 4, b =-8, c =-3
• a = 4, b = 8, c = 3
• a = 4, b = 8, c = -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Write down: a=1, b=6, c=-13
• Make the equation equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

 2x² - x - 3 = 0
Find the discriminant. (b² - 4ac)

• 25
• -23
• -25
• 0

Solve     3x² - 11x + 10 = 0

• -17/10 and -2
• 1 and 2
• 3/2 and 2
• 17/10 and 2

Solve     8x² - 6x + 1 = 0

• No Solution
• 0 and 1
• -1/2 and -1/4
• 1/4  and 1/2

Solve    2x² + 7x - 15 = 0

• -3/2 and 5
• No Solution
• -5 and 3/2
• 7/10 and 5