Question

What is the domain of the function f(x) = x2 + 3x + 5?

Answer 1

3/2?

Answer 2

Be certain you understand what "domain" means in this context.

Rule: The domain of all polynomials is the set of all real numbers. Is f(x) = x^2 + 3x + 5
a polynomial, or not?


f(x) = x2 + 3x + 5 should be written as f(x) = x^2 + 3x + 5. x^2 represents "the square of x." x2 is vague.

Answer 3

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