How do you find the domain of #x^2 + 4#?

1 Answer
Jun 29, 2017

Answer:

See below.

Explanation:

The domain is the values that #x# can take on, without causing #y# to be indeterminant.

As #x# approaches #oo#, #x^2+4# approaches #oo#.

As #x# approaches #-oo#, #x^2+4# approaches #oo#.

As #x# approaches #0#, #x^2+4# approaches #4#.

This is actually the graph of a quadratic (where #x# can take on any value), so the domain is #(-oo,oo)#.