\"\"

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The quadratic function is \"\".

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To find the x-intercept.

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\"\"                               (Substitute f (x) = 0)

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The equation compare to quadratic equation, then a = 1, b = 4 and c = 7.\"\"

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Quadratic formula: \"\".

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\"\"          (Substitute a = 1, b = 4 and c = 7) 

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

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\"\"                      (Simplify)

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

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\"\"

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The solution is \"\".