In fact, this is a simple power reduction process, mainly to reduce the higher power, which is equivalent to reducing X? -x？ -5x-3 is decomposed into polynomials containing (x+ 1).

The specific problem-solving ideas are as follows:

For example, if 104 is divided by 2 to get 50, then the remainder is 4, and the remainder is divided by 2 to get 2, so 104=2*(50+2).

Similarly: X? -x？ -5x-3 divided by (x+ 1), the first one is x? , the remainder is -2x? -5x-3； Divide the remainder by (x+ 1) to get -2x and -3x-3. . . And so on, you can get x? -x？ -5x-3=(x+ 1)( x？ -2x-3)