By solving the equation, we can avoid the difficulty of reverse thinking and directly list the equations with the quantity to be solved. There are many forms of equations, such as one-dimensional linear equation, two-dimensional linear equation, one-dimensional quadratic equation and so on. , can also be combined into equations to solve multiple unknowns.
In mathematics, an equation is a statement containing one or more variables. Solving an equation involves determining which variables have values that make the equation valid. Variables are also called unknowns, and the value of the unknowns satisfying the equation is called the solution of the equation. 1. Move terms and symbols: move some terms in the equation from one side to the other with the previous symbols, and add, subtract, multiply and divide with the variation;
2. The basic properties of the equation
Property 1
Adding (or subtracting) the same number or the same algebraic expression on both sides of the equation at the same time, the result is still an equation. Represented by letters: if a=b, c is a number or an algebraic expression.
Equation, referred to as equation for short, is an equation with unknown numbers. That is, there must be an algebraic expression containing one or more unknowns in the ⒈ equation; 2. The equation is an equation, but the equation is not necessarily an equation.
Unknown number: usually x.y.z is unknown, and other letters can be set, all lowercase letters can be used.
"Quadratic": The concept of quadratic in the equation is similar to algebraic expression. It refers to the project with the largest number of unknown projects. The term with the highest degree is the degree of the equation.
"Solution": the solution of the equation, which means that the root of the equation is the value of the unknown on both sides of the equation, and the solution of the unary equation, both of which can be commonly used.
Solving equation: the process of finding the solution of the equation, which can also be said to be the process of finding the value of the unknown quantity in the equation, or the process of explaining that the equation has no solution is called solving the equation.
In the equation, identities are called identities, and contradictions are called contradictory equations. When the unknown quantity is equal to a specific value, it is called a conditional equation, which can make the values on both sides of the equal sign equal, for example, the equal sign is established in time. The value of the unknown that makes the left and right sides of the equation equal is called the solution of the equation.