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What is the sign of the discriminant \(D\) for the equation \(3x^2-2x+4=0\)?

Answer and explanation

Correct answer: negative

For a quadratic equation \(ax^2+bx+c=0\), the discriminant is \(D=b^2-4ac\). Here, \(a=3\), \(b=-2\), and \(c=4\), so \(D=(-2)^2-4(3)(4)=4-48=-44\). Since \(D<0\), the discriminant is negative and the equation has no real roots. It is not zero; a zero discriminant occurs only when \(b^2=4ac\). In an exam, first identify \(a,b,c\) and then apply \(D=b^2-4ac\).

Related tags

Quadratic EquationsDiscriminantNature Of RootsReal RootsMathematicsClass 10 Mcq

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