Question

Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 9x3 + 4x2 – 6x + 9. The shop estimates their costs for that quarter to be given by 7x2 + 2x + 1. For the second quarter, find and simplify a polynomial that will represent their profit.

Answer 1

how do I work this ?

Answer 2

Gosh, I want polynomial profit...

Answer 3

Subtract the costs from the revenue to get profit..

Answer 4

ok

Answer 5

Go on thne, let's see..

Answer 6

9x3 + 4x2 – 6x + 9
minus 7x2 + 2x + 1

Answer 7

U gonna do it?

Answer 8

im working it out now on paper

Answer 9

is it 9x ^3 - 10x correct

Answer 10

U have gone a bit wrong there...

Forget the paper, look at the screen.

Answer 11

ok

Answer 12

9x3 + 4x2 – 6x + 9
minus 7x2 + 2x + 1

Answer 13

So for each "column" take the bottom one away from the top one....

Answer 14

So the first one is 9x^3 take away nothing so

9x^3 is the first part of the answer.

Answer 15

Now u do the next column.

Answer 16

4x ^ 2 u take nuthin from that either rite

Answer 17

im sorry thats 4 x 2 = 8

Answer 18

4x^2
7x^2

Take the bottom one away from the top one...

Answer 19

3x ^ 2

Answer 20

What's 4-7?

Answer 21

-3

Answer 22

So -3x ^ 2, right?

Next column.

Answer 23

yes

Answer 24

-6x
2x

Take the bottom away from the top.

Answer 25

-4x

Answer 26

-6-2?

Answer 27

-4

Answer 28

-6+2?

Answer 29

-8

Answer 30

Right, -8.

And the last column is?

Answer 31

9 -1=8

Answer 32

Right, now put all 4 pieces together...

Answer 33

9x ^ 3 - 3x ^ 2 - 8 + 8

Answer 34

-8x + 8, right?

Answer 35

yes sorry

Answer 36

9x ^ 3 - 3x ^ 2 - 8x + 8

I don't think we can make that any simpler, so u r done.

Answer 37

yes and thanku u ,u been a great help to me ,u made this very clear

Answer 38

ur welcome:-)

Answer 39

cool