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  2. Equation solving - Wikipedia

    en.wikipedia.org/wiki/Equation_solving

    The methods for solving equations generally depend on the type of equation, both the kind of expressions in the equation and the kind of values that may be assumed by the unknowns. The variety in types of equations is large, and so are the corresponding methods. Only a few specific types are mentioned below.

  3. Congruum - Wikipedia

    en.wikipedia.org/wiki/Congruum

    A congruent number is defined as the area of a right triangle with rational sides. Because every congruum can be obtained (using the parameterized solution) as the area of a Pythagorean triangle, it follows that every congruum is congruent. Conversely, every congruent number is a congruum multiplied by the square of a rational number. [7]

  4. Bracket (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Bracket_(mathematics)

    In mathematics, brackets of various typographical forms, such as parentheses ( ), square brackets [ ], braces { } and angle brackets , are frequently used in mathematical notation. Generally, such bracketing denotes some form of grouping: in evaluating an expression containing a bracketed sub-expression, the operators in the sub-expression take ...

  5. Completing the square - Wikipedia

    en.wikipedia.org/wiki/Completing_the_square

    Then the quantity ⁠ ⁠ represents the area of a square of side ⁠ ⁠ and the quantity ⁠ ⁠ represents the area of a pair of congruent rectangles with sides ⁠ ⁠ and ⁠ ⁠. To this square and pair of rectangles one more square is added, of side length ⁠ b 2 a {\displaystyle {\tfrac {b}{2a}}} ⁠ .

  6. Elementary algebra - Wikipedia

    en.wikipedia.org/wiki/Elementary_algebra

    To solve this kind of equation, the technique is add, subtract, multiply, or divide both sides of the equation by the same number in order to isolate the variable on one side of the equation. Once the variable is isolated, the other side of the equation is the value of the variable. [37] This problem and its solution are as follows: Solving for x

  7. Cramer's rule - Wikipedia

    en.wikipedia.org/wiki/Cramer's_rule

    In linear algebra, Cramer's rule is an explicit formula for the solution of a system of linear equations with as many equations as unknowns, valid whenever the system has a unique solution. It expresses the solution in terms of the determinants of the (square) coefficient matrix and of matrices obtained from it by replacing one column by the ...

  8. Sides of an equation - Wikipedia

    en.wikipedia.org/wiki/Sides_of_an_equation

    In solving mathematical equations, particularly linear simultaneous equations, differential equations and integral equations, the terminology homogeneous is often used for equations with some linear operator L on the LHS and 0 on the RHS. In contrast, an equation with a non-zero RHS is called inhomogeneous or non-homogeneous, as exemplified by ...

  9. Symbols of grouping - Wikipedia

    en.wikipedia.org/wiki/Symbols_of_grouping

    But if it is used only on the left, it groups two or more simultaneous equations. There are other symbols of grouping. One is the bar above an expression, as in the square root sign in which the bar is a symbol of grouping. For example √ p+q is the square root of the sum. The bar is also a symbol of grouping in repeated decimal digits.

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