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What is the discriminant \\(D\\) of the equation \\(4x^2+4x+1=0\\)?

Answer and explanation

Correct answer: 0

For a quadratic equation \\(ax^2+bx+c=0\\), the discriminant is \\(D=b^2-4ac\\). Here, \\(a=4, b=4, c=1\\), so \\(D=4^2-4(4)(1)=16-16=0\\). Therefore, the correct answer is 0, and the roots are equal. Choosing 8 or 16 results from an incorrect subtraction in the formula. Exam tip: when \\(D=0\\), the quadratic equation has two equal real roots.

Related tags

Quadratic EquationsDiscriminantNature Of RootsEqual RootsMathematicsClass 10 Mcq

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