基礎math-u05-d02
When an inequality is multiplied or divided by a negative number, the inequality sign must be:
A. Reversed✓ 答案
B. Kept the same
C. Replaced by an equals sign
D. Removed entirely
解說
Multiplying by a negative number reverses the order of a number line, so the sense of the inequality flips. For example -2x > 6 gives x < -3.