SOLUTION: Please help me, I've got this problem that I don't know what to do with it I think I have to rationalize the denominnators, but I'm not sure, as it's kinda weird. It's the square o

Algebra ->  Square-cubic-other-roots -> SOLUTION: Please help me, I've got this problem that I don't know what to do with it I think I have to rationalize the denominnators, but I'm not sure, as it's kinda weird. It's the square o      Log On


   



Question 115026: Please help me, I've got this problem that I don't know what to do with it I think I have to rationalize the denominnators, but I'm not sure, as it's kinda weird. It's the square of 4 a^5 b^6 over the square of 3 a^2 b^4 c^2. How do I solve this? Whatever do you do with the letters? Please get back to me quickly, I have serval other oproblems like this and if any of your could show me how to do them, I'm certain I can do the rest on my own.
Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
square of 4 a^5 b^6 over the square of 3 a^2 b^4 c^2
--------
(4a^5b^6)^2 / (3a^2b^4c^2)^2
= (16/9)(a^10/a^4)(b^12/b^8)(1/c^4))
= (16/9)(a^6)(b^4)(1/c^4)
= (16a^6b^4)/(9c^4)
===============
Cheers,
Stan H.

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28+4%2Aa%5E5%2A+b%5E6%29+%2Fsqrt%283+%2Aa%5E2%2A+b%5E4%2A+c%5E2%29….raise to the second power (you already know from relationship between exponents and radicals: the appropriate exponent will "undo" an radical, and the right power will "undo" a root.)
%28sqrt%284+%2Aa%5E5%2A+b%5E6%29%29%5E2+%2F%28sqrt%283%2A+a%5E2+%2Ab%5E4+%2Ac%5E2%29%29%5E2…...."undo" a square root
4+%2Aa%5E5+%2Ab%5E6+%2F%283+%2Aa%5E2%2A+b%5E4%2A+c%5E2%29+….

4%2A+a%5E5%2A+b%5E6+%2F%283+%2Aa%5E2%2A+b%5E4+%2Ac%5E2%29+….apply basic exponent rule: whenever you divide two terms with the same base, you can subtract the exponents: a%5Em%2Fa%5En=a%5E%28m-n%29
4+%2Aa%5E%285-2%29%2A+b%5E%286-4%29+%2F%283%2Ac%5E2%29+….

4%2A+a%5E3%2A+b%5E2%2F%283%2Ac%5E2%29+….