SOLUTION: please help me simplify the following: a^-1-3a^-2/2^-2

Algebra ->  Equations -> SOLUTION: please help me simplify the following: a^-1-3a^-2/2^-2      Log On


   

Question 333069: please help me simplify the following:
a^-1-3a^-2/2^-2
Answer by benazir.sj@gmail.com(109) About Me  (Show Source):
You can put this solution on YOUR website!
a^-1-3a^-2/2^-2
solution:
(1/a -3/a^2)
____________
1/2^2

=(a^2 -3a)/a^3
_______________
1/4

=a(a-3)*4/a^3
=4(a-3)/a^2