# Equations

Again and again you will work with **equations** in mathematics. For this you have to know the different types and their solution methods.

## Types of equations

Type | Example |
---|---|

Linear equations | $3x+6=0$ |

Quadratic equations | $2x^2-4x+8=0$ |

Cubic equations | $x^3+5x^2+4x+2=0$ |

Fractional equations | $\frac{5x}{3x+15}=10$ |

Exponential equations | $3^x=27$ |

Logarithm equations | $\log x=2$ |

## Solve equations

The solution method depends on the type of equation.

Type | Solution method |
---|---|

Linear equations | Equivalent transformation |

Fractional equations | Equivalent transformation |

Quadratic equations | Quadratic formula (PQ) Quadratic formula (abc) |

Biquadratic equations | Substitution |

Cubic equations | Polynomial long division |