Question

Let f(x)= -2x+4 and g(x)= -6x-7. Find f(x)-g(x).

I need help solving this! @priyar

Answer 1

Do you know how to set it up first?

Answer 2

I don't.

Answer 3

Okay, well as you can tell it is just subtraction, so all you need to do is set it up so that the equation for f is before g and that g is being taken away..

So here's the set up:

-2x + 4 - (-6x) - 7

Answer 4

Okay, so what would I do next?

Answer 5

Okay I wrote the last half wrong let me fix it

-2x + 4 -(-6x - 7)

Next you will distribute the -1 in front of the parentheses into everything everything inside of the parentheses.. Can you do that for me?

Answer 6

I don't know how, can you help? @xMissAlyCatx

Answer 7

Yes. In order to distribute the -1 to everything in the parentheses, all you need to do is change the signs of what is in them since it is only one..

So you'd get -2x + 4 + 6x + 7

Now all you need to do is combine like terms..

Answer 8

So, -2x+6x and 4+7?

Answer 9

Or is there another way?

Answer 10

That's fine as well..

Answer 11

Is there a better way?

Answer 12

Umm, not really. But you need to make sure to make the -2x and 6x into 4x..

Answer 13

So, if I do 4+7 I get 11 and -2x+6x I get 4x

Answer 14

4x+11?

Answer 15

Correct! :)

Answer 16

What next?(:

Answer 17

Are you solving for x?

Answer 18

I'm solving f(x)-g(x)

Answer 19

Because I'm pretty sure that's all there is to it.

Answer 20

Yeah, they've been subtracted already so that should be it.

Answer 21

So my answer would be 4x+11?

Answer 22

Or 4x-11

Answer 23

I'm confused now..

Answer 24

it is + 11

Answer 25

You've already done the subtracting part..

Answer 26

My final answer would be 4x+11?

Answer 27

Yes.

Answer 28

Can you help me with another question?(: I can open a new post.

Answer 29

yeah sure. :P

Answer 30

I don't have too much time left but I will do my best to help with what I can..