$\"\"$

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Observe the graph :

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The vertex of the parabola is $\"\"$ and parabola passes through the points $\"\"$ and $\"\"$ .

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The equation of the parabola is in the form of $\"\"$ .

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$ .

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Parabola passing through the point $\"\"$ .

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Substitute $\"\"$ .

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$\"\"$

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Here $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Therefore, the equation of the parabola is $\"\"$ .

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$\"\"$

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The equation of the parabola is $\"\"$ .