Quadratic Formula Example 6 Lesson Slides: 18 Slides

18 Slides • 11 Questions

1

Quadratic Formula & Discriminant

2

Multiple Choice

$x^2-4x-7=0$
Which example below uses the quadratic formula correctly?

1

$\frac{-\left(4\right)\pm\sqrt{\left(-4\right)^2-4\left(1\right)\left(-7\right)}}{2\left(1\right)}$

2

$\frac{-\left(-4\right)\pm\sqrt{\left(-4\right)^2-4\left(1\right)\left(-7\right)}}{2\left(1\right)}$

3

$\frac{-\left(-4\right)\pm\sqrt{\left(-4\right)^2-4\left(1\right)\left(7\right)}}{2\left(1\right)}$

3

Multiple Choice

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

1

Get factored form

2

Write down: a=1, b=6, c=-13

3

Make it equal 0 by subtracting 3 on each side

4

Type it all in a calculator.

4

Multiple Choice

Which graph has a discriminant = 0?

1

None of them

2

Red

3

Blue

4

Green

5

Multiple Choice

In the equation

y = x² +5x +7, match each coefficient with its correct letter

1

a=0, b=5, c=7

2

a=1, b=5, c=7

3

a=7, b=5, c=1

4

a=2, b=1, c=5

6

Multiple Choice

Determine the values of

a, b, and c for

the quadratic equation:

4x² – 8x = 3

1

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

2

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

3

a = 4, b = 8, c = 3

4

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

7

Multiple Choice

Which letter corresponds to the leading coefficient of a quadratic expression or equation?

1

a

2

b

3

c

4

y

8

Multiple Choice

Which letter corresponds to the leading coefficient of a quadratic expression or equation?

1

a

2

b

3

c

4

y

9

10

11

12

Open Ended

What is a, b and c?

Type response here

13

14

15

16

17

18

19

Fill in the Blanks

What's the number under the radical?

Type answer...

20

21

22

23

Open Ended

How did you get rid of a negative under a radical?

Type response here

24

25

26

27

28

Fill in the Blanks

80i/16=?

Type answer...

29

Quadratic Formula & Discriminant

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