$\"\"$

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The function is $\"\"$ .

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Write the function in vertex form.

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$\"\"$ (Original function)

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$\"\"$ (it is not a perfect square)

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$\"\"$ (Add and subtract $\"\"$ )

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$\"\"$ (Write $\"\"$ as a perfect square)

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$\"\"$ .

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$\"\"$

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Vertex form of the function $\"\"$ is $\"\"$ .