00:01
Okay, so a rational expression is always m, mth root of a to the nth power.
00:08
Or another way to write this is this is n over m, where n is my exponent and m is my root.
00:17
So square root, for example, square root of 4 to the third.
00:22
This is, if there's no number, it's assuming to be 2, so this would be 4 to the 3 over 2.
00:27
Okay, so suppose i want to simplify this following expression.
00:31
Seventh root of a times fifth root of a to the fourth.
00:37
How could i simplify this? well, excuse me, this isn't seventh root, but this is 7 times square root of a.
00:45
Okay, so what i could do is write each of these in terms of an exponent.
00:49
This is square to the first, so 7a to the 1 half times, this would be a to the 4 over 5...