ax² + bx + c = 0,    a ≠ 0.

Incomplete Quadratic Equations

ax² = 0

x = 0

ax² + bx = 0

x (ax + b) = 0

x = 0

ax² + c = 0

Properties

Quadratic Equation from Solutions

S = x₁ + x₂

P = x₁ · x₂

Factoring Quadratic Equations

a x² + bx +c = 0

a · (x -x₁ ) · (x -x₂ ) = 0

Biquadratic Equation

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