#### Transcript of Quadratic Formula

Quadratic Formula is...

find the solutions to the

quadratic equation, using

the quadratic formula.....

2x - 8x + 3 = 0

2

3x + 5x - 2 = 0

2

-AND-

0.42 and 3.58

-2 and 0.33

-AND-

Answers:

x + 6x = 10

2

(x + 9) = 64

2

10x - 4 = 6x + 5

2

2

**answers:**

-7.36 and 1.36

-1.5 and 1.5

-17 and -1

For the period 1990–2002,

the amount of money y (in billions of dollars)

spent in the United States on books and maps can be modeled by the function

where x is the number of years since 1990.

y = 0.0178x + 1.5x + 16

a. Find the amount of money spent in the year 1993

b. Find the year in which 20 billion dollars were spent on books and maps.

c. Find the year in which 32 billion dollars were spent on books and maps.

**answers:**

a.

b.

c.

between 1992 and 1993

between 1999 and 2000

2

$20.66 (Billion)

HOW ABOUT THESE?

get them into

standard form,

then solve using

quadratic formula

Full transcript