Quadratic Equation Calculator.
Given: 2 x² + x - 6 = 0

HOW TO USE: Touch the Reset button then enter new number. Remember to enter 1 for X² and X, if it has no constant number. Don't forget to enter the negative sign. Then touch the Solve button.

X² + X + = 0

X₁ = and X₂ =

NaN means Not a Number. The answer is imaginary number represented with letter i, to tell the reader that the answer is not available in real number. See explanation below

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( X + ) ( X + ) = 0
factors of quadratic equation

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First root = X₁ =
Imaginary answer if NaN

X₁ = b + i

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Second root = X₂ =
Imaginary answer if NaN

X₂ = b - i

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X₁ = ( b + Square Root ( b² - 4 a * c ) ) / 2 * a

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X₁ = ( b + Square Root ( ) ) / =

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X₂ = ( b - Square Root ( b² - 4 a * c ) ) / 2 * a

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X₂ = ( b - Square Root ( ) ) / =

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Below is the solution using graphing method

Graph created using GeoGebra