Question 427789
1) Solve -r^-2 if r=-3
Replace r with -3 and write it like this in your calc:
-(-3)^-2, you will get -.1111 which is {{{-1/9}}}
Because if you thought of it as
-({{{1/-3}}}*{{{1/-3}}}) = -({{{1/9}}})
:
2) What is the difference between the following three probs. I am just not understanding what to do about the - sign and when to do it!
-5^-3
(-5)^-3
-(5)^3 
:
There is no difference in the first two, enter each like it is written into your calc, they will all give the same result, that last one will = -125