00:01
Okay, the first thing we do is take this item here and write it as x plus 1 over x and then x squared plus x minus 6.
00:18
Just factor at the bottom and that in turn becomes x plus 1 over x and then x plus 3 times x minus 2.
00:32
So, factorize the bottom, basically, like that.
00:37
And now we do partial fractions.
00:40
So we let x plus 1 over x, x plus 3, x minus 2, equal a over x over x plus b over x plus 3 plus c over x minus 2.
01:03
And now we find a, b, and c.
01:05
Do that, multiply both sides by all of this.
01:10
So i get x plus 1 equals a, and then x plus 3 times x minus 2, b times x, like this, b and x minus 2, plus c, x and x minus 2, plus c, x and x.
01:43
Plus 3.
01:46
To find a, b, and c give x values...