Find the Roots with the Quadratic Formula

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

If there is one solution, the discriminant is . . .

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

• -2, 4
• -8
• ±8
• No real solution

Tags

CCSS.HSA-REI.B.4B

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.8.EE.A.2

• -4, 2
• -2, 4
• -16
• -4

Tags

CCSS.HSA-REI.B.4B

9k² = 225

• 4

• 4, -4

• 25, -25

• -5, 5

Tags

CCSS.8.EE.A.2

Solve
4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

Tags

CCSS.8.EE.A.2

What is this?

• 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

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 it equal 0 by subtracting 3 on each side

• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

The solutions of a quadratic equation are known as the _____.

• Vertices

• Roots

• Squares

• Formulas