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Demonstration on how to use your smartphone as your formula and calculator tool


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X² + X

+ = 0

X₁ = Answer

X₂ = Answer

If the answer is NaN (Not a Number). It means the answer is imaginary number.

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

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First root = X₁ =
Imaginary answer if X₁ = NaN

X₁ = b + i

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Second root = X₂ =
Imaginary answer if X₂ = 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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