 is a quadratic equation in the variable x. Here a, b, c are real numbers and a �‰� 0

If α is the root of quadratic equation Then For a given quadratic equation, The roots can be given by Exercise 4.1 (NCERT Solution) - Part - 1

1. Check whether the following are quadratic equations: Since, the equation is in the form of So, it is a quadratic equation. Since, the equation is in the form of So, it is a quadratic equation. Since, the equation is not in the form of So, it is not a quadratic equation. Since, the equation is in the form of So, it is a quadratic equation. Since, the equation is in the form of So, it is a quadratic equation. Since, the equation is not in the form of So, it is not a quadratic equation. Since, the equation is not in the form of So, it is not a quadratic equation. Since, the equation is in the form of So, it is a quadratic equation.

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