What is a quadratic function

The video tutorial introduces quadratic functions, defining them as polynomials of degree 2 where the coefficient 'a' cannot be zero. It explains the importance of quadratic functions in various mathematical applications, such as using the quadratic formula, completing the square, and finding the axis of symmetry. The tutorial also covers the parent graph of a quadratic function, which is a parabola symmetric about the y-axis. Key concepts include understanding the format of a quadratic function and the roles of coefficients a, b, and c.

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