Which of the following is a quadratic equation?
Answer and explanation
Correct answer: \(x^2+3x+2=0\)
A quadratic equation is a polynomial equation whose highest power (degree) of the variable is 2. In option A the highest power is 2, so it is quadratic. Option B is linear (degree 1). Option C is cubic (degree 3). Option D is not a polynomial because the variable appears in the denominator, so it cannot be a quadratic. Exam tip: first check the highest exponent and ensure the expression is a polynomial (no variables in denominators).
Frequently asked questions
What is the correct answer to this question?
\(x^2+3x+2=0\)
Why is this the correct answer?
A quadratic equation is a polynomial equation whose highest power (degree) of the variable is 2. In option A the highest power is 2, so it is quadratic. Option B is linear (degree 1). Option C is cubic (degree 3). Option D is not a polynomial because the variable appears in the denominator, so it cannot be a quadratic. Exam tip: first check the highest exponent and ensure the expression is a polynomial (no variables in denominators).
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Introduction to Quadratic Equations.
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