Question 281527
a) This is a famous property that is very helpful:

{{{x^-5 = 1/x^5}}}

or

{{{1/x^-3 = x^3}}}

Basically, the only thing you have to do is remove the negative and put it in the denominator if it is on the numerator or put it on top if it is on the numerator

b) Haha, lets see if I can do this:

{{{(-b + sqrt(b^2 - 4ac))/2a}}}
and
{{{(-b - sqrt(b^2 - 4ac))/2a}}}

where you have {{{ax^2 + bx + c}}}