Question

Find the domain of g(x)=1-2x^2

Answer 1

There is nothing that x is not allowed to be in this function, so the domain is all real numbers.

b. g(x)=2x-1

g(-1)=2(-1)-1

g(-1)=-2-1

g(-1)=-3

g(2)=2(2)-1

g(2)=4-1

g(2)=3

c. When the horizontal value (x) is -1, the vertical value (g(x) or y) is -3.

When the horizontal value (x) is 2, the vertical value (g(x) or y) is 3.

long story short

This is a polynomial, so the domain is the set of all real numbers. (this is true for any polynomial)      

Answer 2

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

hope this helps :)