For example, ax 3+bx 2+CX+d divided by ex+F.

It can be divided into a+b+c+d divided by e+f in the order of X.

2. Partial expansion method

For example, 3x 3+5x 2+8x+4 = (ax 2+bx+c) (x+2) to find a.

Partial expansion ax^2 times x equals 3x^3, and a equals 3.

3. The undetermined coefficient method

3a+2 b+5c = 7 5a+4 b+3c = 8 Find 2a+3 b+2c。

The first formula is multiplied by m and the second formula is multiplied by n.

3m+5n=2 2m+4n=3 5m+3n=2

Find m, n and substitute.

4. Complete classification discussion method

l2x-3l=6

It can be divided into 2x-3=6 or 3-2x=6.

5. Principal component method

When simplifying, you may encounter binary ones such as 3x 3+5x 2y+4xy 2+6y 3.

You can change y into X.

(The above are just some simple examples. I hope I can help you review them briefly. There are many other methods, so I won't list them one by one. The important thing is to accumulate in the ordinary. When you do some difficult problems, you actually use some simple methods and ideas. I hope you can learn and use it flexibly. )

The information comes from Baidu. . . I hope my relatives will adopt me. . . The important thing is to sum up. . High school mathematics must be good at summing up, do it first when you encounter problems, and then look at the answers. Then sum up the idea of the answer. . Be sure to analyze the answer carefully. . . . It is more useful to read a paper thoroughly than to write a 10 paper, and the essence is not quantity. . . . Study hard. . . I hope it helps you,,, O(∩_∩)O~