Solving Quadratics by Formula

Solve using the quadratic formula.

2x² - 9x - 35 = 0

• x = 7/2 and x = -6

• x = -5/2 and x =5

• x = -3/7 and x =6

• x = -5/2 and x = 7

Tags

CCSS.HSA-REI.B.4B

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

Solve by using the quadratic formula.

7x² - 26x - 8 = 0

• x = -1 and x = -7/8

• x = 4 and x = -2/7

• x = -4 and x = 2/7

• x = 4 and x = -7/2

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula

x² + 4x - 40 = -8

• x = -10 and x = -4

• x = -4 and x = 10

• x = -8 and x = 4

• x = 8 and x = -4

Tags

CCSS.HSA-REI.B.4B

• no solution

• no real numbers

• 7

• -8

• 11

• 19.29

• 4.39

• 0.56

• 0.16

Tags

CCSS.HSA-REI.B.4B

g

h

i

-7

189

6

-49

-167

7

265

9

12

-198

Tags

CCSS.HSA-REI.B.4B

Fill in the formula =​ = ​ = ​

• -6

• 1

• -40

• -1

• 6

• 40

Tags

CCSS.HSA-REI.B.4B

Tags

CCSS.HSA-REI.B.4B

j

h

d

4ac-b^2

-b^2-4ac

b^2-4ac

-2a

b

b^2

b^2+4ac

2a

-b

a^2

Tags

CCSS.MATH.CONTENT.HSN.CN.C.7

CCSS.MATH.CONTENT.HSA.SSE.A.1.b

g

h

i

61

5

53

-3

28

2

-5

-1

-7

33

Tags

CCSS.HSA-REI.B.4B