Question

9c^3+7c-(3c^3-12+c)

Answer 1

I want to double check something:
The 9c^3, is the ^3 only on the c, or is it on the entire 9c?

Answer 2

Same question with the 3c^3

Answer 3

its written just like that in he problem

Answer 4

Okie dokie. So we can assume it's only connected on the c.

Answer 5

First thing you can see is that we have no like terms that we can combine. So technically our PEMDAS is useless.

Answer 6

However, you can distribute the - to the stuff in the parentheses.
So what do we get?
Also, POLPAK!

Answer 7

I find pemdas useless generally anyway.

Answer 8

^ :O
How could you hate on the standard order of operations?

Answer 9

Because I rarely use it. And it often confuses people.

Answer 10

so all the signs change in the parenthesis

Answer 11

Yes, because you must distribute the -1 to each term.

Answer 12

But if you don't use it, we get wrong answers! Someone might write 2+3^2 as 25 instead of 11!

Answer 13

now combine like terms

Answer 14

Correct. :D

Answer 15

pemdas is a restriction on what you cannot do, not a procedure for what you should do.

Answer 16

9c^3+9 or -9

Answer 17

9c^3 - 3c^3

Answer 18

how did you get that

Answer 19

9c^3 + 7c - (3c^3 -12 + c)
^this ^minus ^this

Answer 20

You're combining your like terms right?

Answer 21

right

Answer 22

So you have 9 c^3's and you are subtracting 3 of them.

Answer 23

9c^3 - 3c^3 = 6c^3 is what we'll have left as far as the c^3's go.

Answer 24

where did the 12 go

Answer 25

Then we look at the c's We start with 7, how many are being subtracted?

Answer 26

no-where. We haven't got to the 'ones' terms yet

Answer 27

3c^3-6c+12

Answer 28

no.

Answer 29

ugh

Answer 30

9c^3 - 3c^3 = 6c^3

Answer 31

So you have six c^3's not three of them.

Answer 32

got a second? I can show easier on a whiteboard.

Answer 33

right 6c^3-6c+12

Answer 34

closer.

Answer 35

i was putting wrong numbers

Answer 36

Why is the middle term negative? How many c's did you start with, and how many did you subtract?

Answer 37

7c - c = 6c not -6c

Answer 38

its suoppose to be + beccause its 7-6

Answer 39

right

Answer 40

6c^3+6c+12

Answer 41

yep

Answer 42

You can also factor a 6 if you care, but it's not important

Answer 43

i was jus about to ask that

Answer 44

it cant go any lower can it

Answer 45

nope. you can factor it, but it won't cancel or anything.

Answer 46

Yay.

Answer 47

6(c^3 + c+ 3)