$\"\"$

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The qudractic equation is $\"\"$ .

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Apply subtraction property of equality: If a = b then a $\"\"$ c = b $\"\"$ c.

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$\"\"$ (Subtract 12 from each side)

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

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The equation compare to quadratic equation, then a = 1, b = 11 and c = $\"\"$ 12. $\"\"$

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Quadratic formula: $\"\"$ .

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$\"\"$ (Substitute x = t, a = 1, b = 11 and c = $\"\"$ 12)

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$\"\"$ (Evaluate power: $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$ (Add: 121 + 48 = 169) $\"\"$

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Evaluate square roots: $\"\"$

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$\"\"$

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Separate the solutions $\"\"$ .

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$\"\"$ (Simplify)

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$\"\"$ (Simplify) $\"\"$

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The solution set is $\"\"$ .