Question 2 • High School Math 2 A
A quadratic function is a polynomial whose highest power of x is 2, with a nonzero coefficient on x². In choice B, f(x) = –7x² – x + 2, the highest power is 2 and its coefficient is –7. Choice A has an x³ term, while C is linear; in D, the x² coefficient is 0, so it is linear too.
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