Solving Quadratics with the Quadratic Formula

• no solution

• no real numbers

• 7

• -8

• 11

• 19.29

• 4.39

• 0.56

• 0.16

Tags

CCSS.HSA-REI.B.4B

Tags

CCSS.HSA-REI.B.4B

g

h

i

5

4

-1

7

6

1

-6

-4

-5

2

Tags

CCSS.HSA-REI.B.4B

g

h

i

29

3

14

7

-7

135

-13

13

37

6

Tags

CCSS.HSA-REI.B.4B

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

Tags

CCSS.HSA-REI.B.4B

If b²-4ac is positive, the quadratic equation has:

• Two real solutions that are different

• Two imaginary solutions that are different

• One real solution

• One imaginary solution

Tags

CCSS.HSA-REI.B.4B

What is the discriminant of the quadratic formula?

• b²-4a

• b²-4ac

• b-4ac

• b²-ac

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