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What is the value of \(b\) in \(3x^2+7x-4=0\)?

Answer and explanation

Correct answer: 7

In the standard form \(ax^2+bx+c=0\), \(b\) is the coefficient of \(x\). In \(3x^2+7x-4=0\) the coefficient of \(x\) is 7, so \(b=7\). Common confusion: 3 is the coefficient of \(x^2\) (\(a\)) and -4 is the constant term (\(c\)), so those choices are incorrect. Exam tip: Always rewrite or read the equation in standard form and directly pick \(a, b, c\) before proceeding.

Related tags

Quadratic EquationsCoefficientsB ValueStandard FormIntroduction To Quadratic EquationsMathematicsClass 10 Mcq

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