Will this cause me massive problems in the future if I don't fully 100% understand radicals? For example:
Simplify
I just don't know where to begin... I'm looking in the book for the answer and it says this.
why ?
Then the next step: Which I understand obviously, but then the final step is
This is super complicated to me and it only gets worse... do I really need to know this?
. Since, in the original problem, there was a "2" in the denominator, they multiplied by 8 to get a "perfect fourth power". Similarly, and . Multiplying the denominator by makes the denominator so that .
Of course, if you multiply by in the denominator you must do the same in the numerator.