Question

Which is a quadratic function?

f(x) = 2x + x + 3
f(x) = 0x2 – 4x + 7
f(x) = 5x2 – 4x + 5
f(x) = 3x3 + 2x + 2

Answer 1

Answer is C...

The format of a Quadratic function is

ax2 + bx + c

Answer 2

C

Explanation:

B isn't right. The 0 makes x^2 go away leaving a linear equation.

A is a linear function.

D is a cubic, so the answer is

C which has an x^2 function