00:01
Here we're solving another exponential equation.
00:05
So we have 9 to the z minus 4 equals 6 .28.
00:10
And what i want to do is i want to log both sides in order to be able to start rearranging this and to get rid of the exponentials.
00:17
So i have log of 9 to the z minus 4 equals log of 6 .28.
00:25
Then i want to use the power property and that will allow me to move this exponent here to the front.
00:31
Have z minus 4 log 9 equals log 6 .28.
00:40
And since my goal is z, i want to get rid of all the other stuff that isn't z, and i can't do that until i detach the z from the 4.
00:48
So let's distribute here.
00:49
I have z log 9 minus 4 log 9 equals log 6 .28.
00:58
Next i will move this extra stuff aside...