Question 1006088
Making a number line will make this easier to analyze.  The critical values of x are  a and b.


{{{(x-a)(x-b)>0}}}


Look at each interval that the critical values make.


(-infinity,a)
(-)(-) positive.
TRUE


(a,b)
(+)(-) negative.
FALSE


(b,infinity)
(+)(+) positive.
TRUE


Choices C and E are exactly the same set and that is the solution set.