$\"\"$

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The equation is $\"\"$ .

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Subtract 9x from each side.

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$\"\"$

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$\"\"$

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Compare the equation with $\"\"$ .

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a = 4, b = $\"\"$ and c = 7. $\"\"$

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a) Now we can find discriminant value

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

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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b) The discriminant is positive, so the equation have two rational roots.

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c) Apply quadratic formula: $\"\"$

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$\"\"$ (Replace $\"\"$ , a with 4, and b with $\"\"$ )

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product of two same sings is positive. \ \

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$\"\"$

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

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$\"\"$ \ \ $\"\"$

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

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The discriminant value is $\"\"$ and the equation have two complex roots.

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The solutions are $\"\"$ .