What is it
Inequalities compare values that aren't necessarily equal, using symbols like < , >, ≤ and ≥, and involve solving for a range of possible values rather than a single answer, often shown on a number line.
Why it matters
Inequalities extend equation-solving skills to real situations involving limits and ranges — budgets, speed limits, capacity — and they're essential for later topics like linear programming and graph regions.
Exam tip
Remember that multiplying or dividing an inequality by a negative number flips the inequality sign — this single rule is the most commonly tested and most commonly forgotten rule in the whole topic.
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