00:01
All righty.
00:02
So for 21, we need to get this root set all by itself first before we can do anything.
00:07
So we're going to move this 3x over to this side.
00:12
So we'll have 3 minus 3x.
00:14
And then we're going to divide both sides by negative 6.
00:18
So when we do that, that's going to leave us with the root by itself, x minus square of x minus 1.
00:24
And then 3 over 6 is will reduce to a negative 1 half.
00:28
And i'm going to actually use 0 .5 .5.
00:30
Just so that we're using decimals, negative 0 .5 plus 0 .5x.
00:38
All righty.
00:39
So now we're ready to do what we've usually been doing, which is squaring both sides, which leads to foiling on the left.
00:47
The roots will cancel...
