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The quadratic equation is $\"\"$ .

The equation compare to quadratic equation, then x = r, a = 2, b = 1 and c = - 14.

Quadratic formula: $\"\"$ .

$\"\"$ (Substitute x = r, a = 2, b = 1 and c = - 14)

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

$\"\"$ (Simplify)

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

Using the calculator to evaluate square root.

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Separate the solutions $\"\"$ .

$\"\"$ (Simplify)

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

The solution set is $\"\"$ .