Assume the expression is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The above equation can form quadratic equation $\"\"$ .

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Quadratic formula $\"\"$

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Where a = 1, b = 1 and c = - 5.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .