JAMB 1995 · UME · Q16

Solve the inequality $(x - 3)(x - 4) \le 0$ .

Worked solution (try it first)

The roots are $x = 3$ and $x = 4$ , where the product is zero.
The product is negative between the roots, because one bracket is positive and the other negative there.
"Less than or equal to 0" includes the roots, so $3 \le x \le 4$ , option A.