SOLUTION: 2^-1 exponent - 2^-2 exponent divided by 2^-3exponent Would someone kindly help me with this problem? I hope I keyed it in ok.. I was not sure how to key the expo

Algebra ->  Exponents -> SOLUTION: 2^-1 exponent - 2^-2 exponent divided by 2^-3exponent Would someone kindly help me with this problem? I hope I keyed it in ok.. I was not sure how to key the expo      Log On


   

Question 614822: 2^-1 exponent - 2^-2 exponent
divided by
2^-3exponent
Would someone kindly help me with this problem? I hope I keyed it in ok.. I was not sure how to key the exponents.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
%282%5E-1+-+2%5E-2%29%2F%282%5E-3%29
rewrite it with two denominators
%282%5E-1%29%2F%282%5E-3%29 - %282%5E-2%29%2F%282%5E-3%29
subtract exponents when you divide like terms (this changes the signs of ^-3
2%5E%28-1%2B3%29%29 - 2%5E%28-2%2B3%29%29
:
2^2 - 2^1
4 - 2 = 2