One-dimensional quadratic equation and one-dimensional linear equation are both integral equations, which are a key content of junior high school mathematics and the basis of studying mathematics in the future, and should be paid attention to by students. ?

The general form of unary quadratic equation is: ax2+bx+c=0, (a≠0), which is an integral equation with only one unknown and the highest degree of the unknown is 2. ?

The basic idea of solving quadratic equations with one variable is to simplify them into two quadratic equations with one variable. Quadratic equation with one variable has four solutions:

1, direct Kaiping method.

2. Matching method.

3. Formula method.

4. Factorial decomposition method. ?

related notion

1. An equation containing an unknown number is called an equation. It can also be said that an equation containing unknowns is an equation.

2. Holding the value of the unknown quantity of the equation is called the solution of the equation, or the root of the equation.

3. Solving the equation is the process of finding the values of all the unknowns in the equation.

4, the equation must be an equation, and the equation is not necessarily an equation. An equation without unknowns is not an equation.

5. Verification: After solving the equation, verification is needed. Verification is to substitute the unknown value into the original equation to see if both sides of the equation are equal. If they are equal, then the value obtained is the solution of the equation.

6. Precautions: Write the word "thank you", align the equal sign and check.

7, the equation depends on the relationship between the parts of the equation, and the relationship between addition, subtraction, multiplication and division (complement+complement = sum, and- one of the addends = another addend, difference+subtraction = minuend, minuend-difference = subtraction, factor × factor = product, product ÷ one factor = another.