An equation where some variable is raised to the second power.
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It follows from the definition of a quadratic funtcion.
The discriminant of the quadratic equation: y = ax^2 + bx + c is b^2 - 4ac
The quadratic mean is a measure of the spread of values about their arithmetic mean. By definition, the arithmetic mean of the differences will be zero and so adds no information. Another measure is required and that is the quadratic mean.
THERE ARE TWO TYPES OF QUADRATIC EQUATION1) complete quadratic equation2) incomplete quadratic equation