In fact, it is the "crack" of high school. "Splitting term", "separating constant term", "subtraction" and "dislocation superposition" are the most basic and commonly used methods of algebra operation in senior high school.
Rational fraction decomposition (splitting term), if denominator and molecular factor are low, denominator splitting can be observed. Leveling molecules according to algebraic identity theorem. If the denominator and factor multiples are high, remember that there are several factors when there are multiples. Leveling with denominator undetermined coefficient method.
1, first decompose the denominator into factors, and the formula will be in the form of a/bc;
2. formalize a/bc into two m/b+n/c, where m+n = a.
It's that simple. Don't be fooled by a bunch of formulas of advanced mathematics.