(a) See graph. (b) $-1, 3$ (c) See graph.
Work Step by Step
(a) To obtain the graph of $y=(x-1)^2-4$ from $y=x^2$, shift the curve 1 unit to the right, then shift 4 units down. See graph. (b) We can find the real zeros $x=-1, 3$ (c) See graph.