Question 945344
{{{(x+3)(x-10)>0}}}


Critical values are at -3 and +10.  Those are the roots or zeros of the quadratic expression.  These form THREE intervals on the x-axis, so TEST EACH OF THE INTERVALS!


You know you have y as a parabola, and you want to know for which x-values is {{{y>0}}}.  


SOLUTION:  Set of points ( {{{-infinity}}},-3 ) AND  ( 10, {{{infinity}}} )