Question 94400
Answer


{{{(a/b)^2 - (c/d)^3}}}


{{{(2/3)^2 - (-4/-1)^3}}}


{{{(2/3)(2/3) - (-4/-1)(-4/-1)(-4/-1)}}}


{{{4/9 - (64/-1)}}}


==> {{{4/9 + 64/1 }}}



Taking Lowest common multiple of the denominators, that is 9, you can simplify this expression....


==> {{{(9*(4/9) +9* (64/1))/9 }}}


==> {{{(36 +576)/9 }}}



==> {{{612/9}}}


==>   68  


Hope you found the steps useful...

Regards.


Praseena.