Remember our shifting rules for graphs

shifts the graph of f(x) h units in the x direction.

shifts the graph of f(x) k units in the y direction.

So we need to rewrite a) as follows

Note we will be shifting the graph of

so since we -3 = h we shift the graph of f(x) three units to the left.

for b)

we will shift f(x) up k units..

Good luck.