From the graph , we can see that the line of the graph passes through the points ,
(0,0)
(-1,0)
( 2, 0 )
(3,0)
These are the roots of the equation. The point on which the graph cuts the x axis are the roots of the graph . Here since the graph cuts x axis 4 times , it has 4 roots as ,
-1
2
0
3
Equation of the graph :-