Set 4: Quadratic Equations (Advanced)

Explanation

Answer: A

Find $k$ if the product of roots of $2x^2 - 5x + k = 0$ is 4.

✓ Correct

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Product of roots formula is $c/a$ . 1. $c = k, a = 2$ . 2. Product = $k/2$ . 3. Set equal to 4: $k/2 = 4$ . 4. Solve: $k = 8$ . Choice B is incorrect because it forgets to multiply by $a$ . Choice C is incorrect. Choice D is incorrect.

Key Steps:

•

The correct answer is 8

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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