The mathematical fractional equation in the first volume of the eighth grade is one of the equations, which refers to a rational equation with an unknown denominator or an unknown algebraic expression.

Steps to solve the fractional equation:

1, the simplest common denominator, the fractional equation becomes the whole equation.

2. Find the unknown value according to the steps of solving the integral equation (shifting terms, merging similar terms and converting them into 1).

3. Check the root (you must check the root after finding the value of the unknown quantity, because in the process of transforming the fractional equation into the whole equation, the range of the unknown quantity expands, which may lead to the increase of the root).

On the classification of equations;

1, unary linear equation

An integral equation with only one unknown number and the unknown number is 1 is called a linear equation. The usual form is ax+b=0(a, b are constants, a≠0).

2. Binary linear equation

Definition of binary linear equations: An equation group consisting of two binary linear equations is called binary linear equations.

3. A quadratic equation

An integral equation with an unknown number and the highest degree of the unknown number is 2 is called a quadratic equation.