Which of the following is not a quadratic equation?

Choose the correct alternative. (i) Which of the following is a quadratic equation?

Choose the correct alternative. (i) Which of the following is a quadratic equation?

Choose the correct alternative. (i) Which of the following is a quadratic equation?

Which of the following is not the quadratic equation whose roots are cosec^2thetaand sec^2theta ?

Which of the following is not the quadratic equation whose roots are cosec^2thetaand sec^2theta ?

Which of the following is a quadratic equation ?

Which of the following is a quadratic equation ?

Which of the following is a quadratic equation ?

Choose the correct alternative answers for the following subquestions: Which of the following is a quadratic equation?