ALGEBRAIC METHOD
posted by JACK on .
HOW CAN I SOLVE THE INEQUALITY GRAPHICALLY 3X^2 + 10X  8 > 0

graph the parabola
note the two parts of the graph that are above the xaxis.
The graph crosses the xaxis at 4 and 2/3.
So, the solution set is x< 4 or x > 2/3.