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What is the discriminant \(D\) of the quadratic equation \(2x^2+4x+2=0\)?

Answer and explanation

Correct answer: 0

Here, \(a=2\), \(b=4\), and \(c=2\). Using the discriminant formula \(D=b^2-4ac\), we get \(D=(4)^2-4(2)(2)=16-16=0\). Therefore, the correct answer is 0, and the equation has equal roots. Option 4 is only the value of \(b^2\), not the complete discriminant. In an exam, identify \(a,b,c\) first and substitute them carefully into the formula.

Related tags

Quadratic EquationsDiscriminantNature Of RootsEqual RootsMathematicsClass 10 Mcq

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