Where are you stuck in the process?
the line "y = -x2
+ 4" (but as a dashed line, because this is not an "or equal to" inequality), you've plugged zero in for y and solved the quadratic equation
for the values of x (being the x-intercepts
of the graph), have picked the interval which solves the quadratic inequality
, compared this interval with the graph, and... then what?
Please be specific. Thank you!