In a quadratic equation, the term with 𝑥2 (coefficient a) must be non-zero. If a=0, the equation becomes linear, not quadratic.
In quadratic equation ax² + bx + c = 0, _____ CANNOT be zero.
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.