Solving Quadratics with the Quadratic Formula

• no solution

• no real numbers

• 7

• -8

• 11

• 19.29

• 4.39

• 0.56

• 0.16

g

h

i

-6

2

4

6

-4

-5

7

-1

5

1

g

h

i

6

-13

29

7

3

14

135

-7

37

13

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

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

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

What is the discriminant of the quadratic formula?

• b²-4a

• b²-4ac

• b-4ac

• b²-ac

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.