D dbush New member Joined Oct 25, 2011 Messages 18 Jan 25, 2012 #1 I'm back trying to help my son. I am trying to work a problem so I can better explain to him. The problem is (5r-2)-2 _______ (2r3)2 I started with the power of a power and got here 5-2r4 _____ 22r6 Now what? Can you help? Many thanks
I'm back trying to help my son. I am trying to work a problem so I can better explain to him. The problem is (5r-2)-2 _______ (2r3)2 I started with the power of a power and got here 5-2r4 _____ 22r6 Now what? Can you help? Many thanks
pka Elite Member Joined Jan 29, 2005 Messages 11,978 Jan 25, 2012 #2 dbush said: 5-2r4 _____ 22r6 Now what? Can you help? Click to expand... \(\displaystyle \dfrac{5^{-2}r^4}{2^2r^6}=\dfrac{1}{100r^2}\) because \(\displaystyle {5^{-2}r^4}=\dfrac{r^4}{25}\).
dbush said: 5-2r4 _____ 22r6 Now what? Can you help? Click to expand... \(\displaystyle \dfrac{5^{-2}r^4}{2^2r^6}=\dfrac{1}{100r^2}\) because \(\displaystyle {5^{-2}r^4}=\dfrac{r^4}{25}\).
D dbush New member Joined Oct 25, 2011 Messages 18 Jan 25, 2012 #3 Thank you. You are very helpful as always. Until next time...
