L12 | Degree-Function-problem-Báskhara | It is an algebraic expression of equality | From the sixth year is related to a value to be searched |

L13 | Unknown?Degree-Báskhara-soma and product-multiplication by 1-isolation of the terms-system-replacement- definition-find value-methodology. | It is an algebraic expression of equality | In the sixth year is made unknown value of the approach, which gives an introduction of the equation. Being related to missing data |

L14 | Variable-independent term-root-equality-unknowns-term x squared-a guess-solution set-real solution-complex solution- solving methods | Having an equal or more unknown, or not having solution | Mathematics-proportion-area-perimeter- measures-comparison values |

L15 | Equal-find the value of x-problem solving-balance-only solution-in a chart describing the form of a parable- Baskara-delta root?quadratic | Equality, as if a balance which has to balance the sides. | Like a balance |

L16 | Variable-constant-complete and incomplete equations--incógnita equality-only a root-Báskhara-two roots-there are real solution or not-incomplete full equation-delta-parable-roots?x |
| Mathematics, algebriza situations of everyday life |

L17 | Letters-numbers-problem- reasoning-Signs of operations- system power-Báskhara formula | One way of solving exercises that have lyrics | Solve problems that you do not know one of the elements |

L18 | Numbers-Mathematics-sum of variables-mixture of numbers and letters. | One way to express a mathematical problem. It is a statement that establishes an equality between two mathematical expressions. | Algebraic expressions, interpretation. |