Answer
(a). $-1$, $0$, $1$, $3$
(b). $[-1, 0]$ U $[1, 3]$
Work Step by Step
(a). The solutions of the given equation are the values of $x$ for which $y$ is equal to zero. Therefore, the solutions are the $x$-intercepts of the graph.
$x$-intercepts of the graph are $-1$, $0$, $1$ and $3$
Therefore $-1$, $0$, $1$, $3$ are the required solutions.
(b). The solutions of the given inequality are the values of $x$ for which $y$ is less than or equal to $0$. Therefore, the solutions are the values of $x$ for which the graph lie $below$ the $x-axis$ or at $x-axis$.
The given graph lies below $x-axis$ between $x=-1$ and $x=0 $ and between $x=1$ and $x=3 $ and for $x=-1,0,1,3$ , $y=0 $. Therefore required solutions will be-
$[-1, 0]$ U $[1, 3]$
