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4

Set 2: Polynomial Functions (Advanced)

Explanation

Answer: A

PROBLEM

If f(x) = 3x squared + 2x + 1, find f(5).

If f(x) = 3x squared + 2x + 1, find f(5).

A.

86

✓ Correct
B.

85

C.

172

D.

88

Detailed Explanation

Choice A is the best answer. f(5) = 3(5) squared + 2(5) + 1 = 86

Why others are wrong:
B: 85 is incorrect because it does not satisfy the equation.
C: 172 is incorrect because it does not satisfy the equation.
D: 88 is incorrect because it does not satisfy the equation.
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