# How do you find the maximum or minimum of quadratic functions?

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To find the maximum or minimum of a quadratic function, you can use the vertex formula: x = -b / (2a). Once you find the x-coordinate of the vertex, substitute it into the quadratic function to find the corresponding y-coordinate. This point represents the maximum or minimum value of the quadratic function, depending on whether the leading coefficient (a) is positive (minimum) or negative (maximum). Alternatively, you can also find the maximum or minimum by completing the square or using the first or second derivative tests.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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