00:01
Okay, first thing, first law of logs.
00:04
If i add two logs together with the same base, you multiply the x and x minus 4.
00:11
So log a plus log b, log of a times b.
00:15
Most log base 5 of x times x minus 4 equals 2 is the first step.
00:24
First law of logs.
00:25
Then change from log form to power form.
00:28
The base is 5.
00:31
The power is 2.
00:32
The number is x times x minus 4.
00:38
That comes from this if you know, for example, log base 10 of 100 is 2.
00:46
Log form to power form, 10 squared equals 100.
00:52
So base here, power here, number here...