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If \(a=3,\; b=0,\; c=-12\), which is the corresponding quadratic equation?

Answer and explanation

Correct answer: \(3x^2-12=0\)

Use the standard form \(ax^2+bx+c=0\). Substituting gives \(3x^2+0x-12=0\), and since the \(x\)-term is absent this simplifies to \(3x^2-12=0\). You can further divide by 3 to get \(x^2-4=0\). Closest distractors fail for clear reasons: option C wrongly includes a \(-12x\) term (but \(b=0\)), option B has the wrong sign on the constant, and option D swaps coefficients. Exam tip: always substitute coefficients carefully and then simplify; check whether the \(x\)-term should be present when \(b=0\).

Related tags

Quadratic-EquationsCoefficientsForming-EquationsSubstitutionIntroduction To Quadratic EquationsQuadratic EquationsMathematicsClass 10 Mcq

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