1. ## Algebra2 : Adding and subtracting like Denominators

Today was my first day in Algebra 2, and I really felt low in self steem since I coulnd't solve some fractions.

Here is one I din't understand:

fraction{3X}{X+2} + fraction{6X}{X+2}

Sorry for not using latex

2. ## Re: Algebra2 : Adding and subtracting like Denominators

hi

since the denominators are same you just add the numerators:
$\frac{3x}{x-2}+\frac{6x}{x-2}=\frac{3x+6x}{x-2}=\frac{9x}{x-2}$

3. ## Re: Algebra2 : Adding and subtracting like Denominators

Originally Posted by anonimnystefy
hi

since the denominators are same you just add the numerators:
$\frac{3x}{x-2}+\frac{6x}{x-2}=\frac{3x+6x}{x-2}=\frac{9x}{x-2}$

Thanks I thought that only applied if it was like 2, 8 or something similar but now I notice. By the way siorry I messed up it was x+ 2

4. ## Re: Algebra2 : Adding and subtracting like Denominators

You're welcome.

5. ## Re: Algebra2 : Adding and subtracting like Denominators

Just remember the rule:

$\frac{a}{b}+\frac{c}{b}=\frac{a+c}{b}$

When the b is the same you can add/subtract them if they are not the same you can't, only if you change both the b to the same denominator with LCD.

6. ## Re: Algebra2 : Adding and subtracting like Denominators

Originally Posted by theloser
Just remember the rule:

$\frac{a}{b}+\frac{c}{b}=\frac{a+c}{b}$

When the b is the same you can add/subtract them if they are not the same you can't, only if you change both the b to the same denominator with LCD.
Thanks, I know this is not a place to get tutoring I have already talked about that, but besides Khan academy do you recommend any other place that might help me to learn allot. Khan academy is great but I also want to read

7. ## Re: Algebra2 : Adding and subtracting like Denominators

Originally Posted by vaironxxrd
Thanks, I know this is not a place to get tutoring I have already talked about that, but besides Khan academy do you recommend any other place that might help me to learn allot. Khan academy is great but I also want to read
Start asking people what books are good, and just dive in. Read math books with paper and pen handy. Try to prove theorems yourself before looking at the book's proof. Go as slow as you need to.