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1. Which of the following is a quadratic function?
a. F(x) = x+ 4 b. f(x) = x2 + 1 c. x2 +4x- x2 = y
d. x + y = -4​

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ANSWER

→ B. F(x) = x2 + 1

EXPLANATION

A quadratic function is one of the form f(x) = ax2 + bx + c, where a, b, and c are numbers with a not equal to zero.

F(x) = x2 + 1 → x2

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