#### What is a Trinomial?

A trinomial is a polynomial with 3 terms.. This page will focus on quadratic trinomials. The degree of a quadratic trinomial must be '2'. In other words, there must be an exponent of '2' and that exponent must be the greatest exponent.

$$ \text{Examples of Quadratic Trinomials} $$

$$ 3x^2 + 2x + 1$$ |

$$ 7x^2 + 4x + 4$$ |

$$5 x^2 + 6x + 9$$ |

$$ \red { \text{Non }}\text{-Examples of Quadratic Trinomials} $$

$$ x^{\red 3} + 2x + 1 $$
this is |

$$ 2x + 4 $$
this is not a quadratic trinomial because there is not exponent of 2. In fact, this is not even a trinomial because there are 2 terms |

$$ 5x ^{\red 3} + 6x^2 + 9$$
this is |