00:01
Okay, so the first thing i need to do here is find out what i can factor and what i can't factor.
00:07
So i look at the left side first and the numerator.
00:11
I look here and there's a perfect difference of squares.
00:15
Square root of a squared is a, square root of one is one.
00:19
So i can factor that to a plus one, a minus one.
00:26
And the denominator, there's nothing i can do there.
00:28
But i do like my variables to be first.
00:31
That's just a personal preference.
00:33
I move the 5a to the front, and i keep the negative with it, and then i have plus 2.
00:39
Right now on the right side, i can factor out a 3 because they have 15 and the 6 both have a 3 in common.
00:46
So i have 3, and that leaves me with 5a minus 2, and then i need to factor this.
00:55
And when i factor this, i have to do a times c, which is negative 6.
01:00
The factor pairs of negative 6 are 1 and 6 and 2 and 3.
01:06
So if i do a plus 6 and a minus 1, that'll work.
01:13
So i have a plus 6 and a minus 1.
01:19
And i could always borrow that to check it if i need it to.
01:22
So now i'll see what can i cross cancel...