Question 712363
Since I cannot see the graph myself I can only tell you what to look for. On the graph of a polynomial, the roots will be the x-coordinates of points where the graph intersects the x-axis, IOW x-intercepts. These will be the real roots of the polynomial. Complex roots cannot be determined from the graph. If the graph never intersects the x-axis then it has no real roots. (A cubic polynomial, like yours, should intersect the graph 1 to 3 three times.)