Can you help me on this algebra 2 question?

The domain of (f+g)(x) is all real numbers.

The domain of (f-g)(x) is all real numbers.

Step-by-step explanation:

The given functions are

and

By the algebraic properties of polynomial functions:

This becomes:

We subtract to obtain:

Also

When x=-4

Then also;

The domain refers to the values that makes the function defined.

Both are cube root functions and are defined for all real numbers.

The domain of (f+g)(x) is all real numbers.

The domain of (f-g)(x) is all real numbers.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225