Set 15: Quadratic Equations

Explanation

Answer: A

Which quadratic inequality has no solution?

$x^2 < -1$

✓ Correct

$x^2 > -1$

$x^2 \geq 0$

$x^2 - 1 < 0$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. $x^2$ is always non-negative. It is impossible for it to be less than -1. Choice B is incorrect because solution is all reals. Choice C is incorrect because solution is all reals. Choice D is incorrect because solution is $-1 < x < 1$ .

Key Steps:

•

The correct answer is $x^2 < -1$

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.

← Previous Next →

🎯 Keep Practicing!

Master all sections for your best SAT score

📚Reading & Writing→📖Vocabulary→