# Menu » Equations and inequalities

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- What is an equation?
- What is an inequality?
- Reversed arrow chain method
- Card method
- Linear equations (Balance method)
- Linear inequalities
- Quadratic equations (x
^{2}=number/sum-product-method/quadratic-formula) - Quadratic inequalities
- Quadratic equations with a parameter
- Derivation of the quadratic formula
- Simultaneous equations
- Exponential equations
- Fractional equations
- Power equations
- Higher degree equations
- Higher degree inequalities
- Logarithmic equations
- Trigonometric equations
- Equations with fractional exponents
- Modulus equations
- Square root equations
- Enclosure method