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Quadratic Equations: Formulae, Discriminant & Word Problems › Discriminant & Nature of Roots

Formula Sheet & Exam Traps: The Nature of Roots

Step 2 of 4 • ⏱️ 6 min • ⚡ 15 XP
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Common Exam Traps

> **Exam Trap:** If $b = 0$ in $ax^2 + c = 0$, $D = -4ac$. If $a$ and $c$ have opposite signs, $-4ac > 0$, guaranteeing real roots regardless of $b$.
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