Question

What is the domain of the quadratic function given by f(x) = 2x2 + 2x - 4?

A) [0, +∞)
B) all real numbers
C) all negative real numbers
D) all positive real numbers

Answer 1

B) all real numbers.

Explanation:

From Algebra we know that polynomials, including the quadratic function presented on statement, are continuous in every part of real number set, which means the existence of images for every element of domain. Hence, the domain of the quadratic function is all real numbers. (Answer: B)