Which represents a quadratic function?
f(x) = 2x3 + 2x2 – 4
f(x) = –7x2 – x + 2
f(x) = –3x + 2
f(x) = 0x2 + 3x – 3

We must recall that the standard form of a quadratic equation, f(x), is f(x) = Ax² + Bx + C meaning the highest degree of polynomial must be 2 and A must not be equal to zero. From the given choices, we f(x) = -7x² - x + 2 to satisfy such conditions. Thus, the answer is B: f(x) = -7x² - x + 2.

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