Question

The solution of the inequation $x^2-4\le 0$ is

• A. $-\infty <x\le -2$
• B. $-2\le x\le 2$
• C. $2<x\le \infty$
• D. $x\ge \pm 2$

Answer 1

Answer: (B)

$-2\le x\le 2$

Given: $x^2-4\le 0$

To find the solution of the inequalities

Sol: $x^2-4\le 0⟹(x-2)(x+2)\le 0⟹-2\le x\le 2$