$\"\"$

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Write an equation with the intercepts $\"\"$ and $\"\"$ and $\"\"$ .

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General form of quadratic equation $\"\"$ .

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Above three intercept points passes through a quadratic equation.

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

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$\"\"$

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$\"\"$ equation $\"\"$ .

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

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$\"\"$

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$\"\"$ equation $\"\"$ .

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

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$\"\"$

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$\"\"$

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Substitute $\"\"$ in equation (1).

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$\"\"$

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Substitute $\"\"$ in equation (2).

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$\"\"$

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Solution of two equations $\"\"$ , $\"\"$ is $\"\"$ and $\"\"$ .

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Substitute $\"\"$ , $\"\"$ and $\"\"$ in $\"\"$ .

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The equation is $\"\"$ .

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A Friends equation:

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Write an equation with the intercepts $\"\"$ and $\"\"$ and $\"\"$ .

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$\"\"$ -intercepts are $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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Compare with $\"\"$ .

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$\"\"$

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But the $\"\"$ -intercept is $\"\"$ .

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When $\"\"$ the graph passes through $\"\"$ .

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Make the equation $\"\"$ value equals to one.

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$\"\"$

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$\"\"$ .

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Compare the equations $\"\"$ and $\"\"$ are same.

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The intercepts of two equations are $\"\"$ and $\"\"$ and $\"\"$ .

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The equation is $\"\"$ .