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.
Homotopy equation:
If the solutions of two equations are the same, then these two equations are called homosolution equations.
The same solution principle of the equation;
Adding or subtracting the same number or the same equation on both sides of the equation is the same solution equation as the original equation.
2. The equation obtained by multiplying or dividing the same number whose two sides are not zero is the same as the original equation.
Integral equation: An algebraic expression equation with unknowns on both sides is called an integral equation.
Fractional equation: The equation with unknown number in denominator is called fractional equation.