00:01
We have 3a over a plus 1 plus 2a over a minus 3.
00:04
So, well, the lcd is going to be the product of a plus 1 times a minus 3.
00:10
So it's the quantity a plus 1 times the quantity a minus 3.
00:14
So, well, i have an a plus 1 factor here.
00:18
I need an a minus 3.
00:19
So i'm multiplying this first fraction by a minus 3 over a minus 3, right? the quantity a minus three over the quantity a minus three.
00:33
And then here, while i have an a minus three, i do the a plus one.
00:37
So i'm multiplying by a plus one over a plus one.
00:42
Okay.
00:43
What do we get? well, a minus three times three a.
00:47
Okay.
00:48
Well, we're going to need to distribute the three a into the two terms here, right? i have one term, three a, and i have two terms, a minus three.
00:57
Let me seek a plus or minus sign.
00:59
That's going to separate your terms.
01:01
So we have 3a times a, which is equal to 3a squared, but then 3a times negative 3, but that's negative 9a.
01:12
So i have 3a squared minus 9a, and then we have a plus 2a times a plus 1...