Set 14: Quadratic Equations

Explanation

Answer: A

Find the sum of the roots of $3x^2 + 12 = 0$ .

✓ Correct

-4

Undefined

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Rewrite the equation in standard form: $3x^2 + 0 x + 12 = 0$ . 1. Identify $b = 0$ . 2. Sum = $-b/a = -0/3 = 0$ . Note: The roots are imaginary ( $2i$ and $-2 i$ ), but their sum is still 0. Choice B is incorrect. Choice C is incorrect. Choice D is incorrect.

Key Steps:

•

The correct answer is 0

Why others are wrong:

B: Choice B is incorrect and may result from a calculation error.

C: Choice C is incorrect and may result from a calculation error.

D: Choice D is incorrect and may result from a calculation error.

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