Which function is a quadratic function?

An equation having second degree is a quadratic function

In mathematics a quadratic equation, quadratic function or simply quadratic polynomial is the one which has second degree. This type of function always give us two values when we solve it. We can identify quadratic function by looking at the variables. The highest power that a variable can have is 2. The variable with second power is written first followed by the variable with first power and then comes the constant for example Y= X² + X =2 is a quadratic function.

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