(a) The graph of `f(x)=(x+84)^2` can be obtained from shifting the graph of `f(x)=x^2` to the 84 units.
(b) The graph of `f(x)=x^2+84` can be obtained from shifting the graph of `f(x)=x^2` 84 units.
(c) The graph of `f(x)=84\sqrt(x)` can be obtained from the graph of `f(x)=\sqrt(x)` vertically by a factor 84.
(d) The graph of `f(x)=\sqrt(84 x)` can be obtained from the graph of `f(x)=\sqrt(x)` horizontally by a factor `\frac(1)(84)`.

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