Question

Simplify the following:

Answer 1

\[\frac{ 3a }{ a+3 } - \frac{ (a-4) }{ a-2 }\]

Answer 2

Common denominator is ....?

Answer 3

Ahhhhh dang...you're right.

Answer 4

Hey, I'm waiting to see your multiplication ;)

Answer 5

It didn't work so I have no idea.

Answer 6

I thought of making both denominators equal but I can't x_x

Answer 7

Show me so I can know where to fix it?

Answer 8

\[\frac{ 6a }{ 2a + 6 } - \frac{ -3a+ 12 }{ 3a + 6 }\]

Answer 9

Ahhh!!! sorry, on the right, they're negatives.

Answer 10

Common denominator is product of (a +3) ( a-2):
-> 3a ( a -2 ) = ....
-> (a - 4) ( a +3) = ...

Answer 11

Just follow me, work step by step fill out the blank!

Answer 12

Haha, I'll try.

Answer 13

Please post here!

Answer 14

Post what?

Answer 15

-> 3a ( a -2 ) = .... ?

Answer 16

\[3a ^{2} - 6a\]

Answer 17

So it's just cross multiply?

Answer 18

Great :)
-> (a - 4) ( a +3) = ... ?

Answer 19

Exactly right :)

Answer 20

\[a ^{2} -12\]

Answer 21

ahh

Answer 22

I forgot some!!!

Answer 23

FOIL method!

Answer 24

\[a ^{2} -4a + 3a\] -12

Answer 25

-> (a - 4) ( a +3) = a² -4a + 3a - 12 = ...

Answer 26

Can you simplify -4a + 3a = ....?

Answer 27

-a

Answer 28

So the answer is....

Answer 29

-> (a - 4) ( a +3) = a² -a - 12

Answer 30

\[\frac{ 2a ^{2} -7a -12 }{ (a+3) (a-2) }\]

Answer 31

Now after cross product, subtract the numerators:
3a²- 6a - (a² -a - 12) = 2a² -6a +a +12 = ...

Answer 32

So I'm right?

Answer 33

-6a + a = ....?

Answer 34

Well the answer on the problem says 7a

Answer 35

I don't see how they get 7a, probably typo :)

Answer 36

Maybe.

Answer 37

I have 3 more and I tried one this way and it doesn't work.

Answer 38

In short, learn how to subtract unlike fraction by cross product!

Answer 39

Open the new posts for new questions!

Answer 40

Make sure your post is correct!