Question

Which is a quadratic function?

A. f(x)=2x+x+3
B. F(x)= 0x^2-4x+7
C. f(x)=5x^2-4x+5
D. f(x)=3x^3+2x+2

Answer 1

C. f(x) = 5x² - 4x + 7

Explanation:

Quadratic functions have a square (x²) in them. Answer B has this as well, however, the coefficient is 0 which would turn x² to 0.