$\"\"$

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The equation is $\"\"$ .

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$\"\"$ (Add 13x to each side)

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Apply commutative property: $\"\"$ )

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The standard form equation is $\"\"$ ,

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compare the above two equations $\"\"$ . $\"\"$

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Apply the Quadratic Formula: $\"\"$

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Product of two different signs is negative)

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$\"\"$ (Evaluate powers: $\"\"$ ) $\"\"$

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ )) $\"\"$

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$\"\"$ (The value of $\"\"$ ))

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$\"\"$ (Seperate the solutions)

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ $\"\"$ (Divide: $\"\"$ )

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$\"\"$ (Divide: $\"\"$ )

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The solutions are $\"\"$ . $\"\"$

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The solutions are $\"\"$ .