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核心知识梳理整式与分式的分水岭是分母中是否含有字母.幂的运算性质是整式乘法的基础,整式乘法包括单项式与单项式、单项式与多项式、多项式与多项式相乘.多项式与多项式相乘的特殊形式形成乘法公式.因式分解与整式乘法是方向相反的变形,因式分解的主要方法有提公因式法和公式法.分式的加减运算关键是通分,通分的关键是找最简公分母;分式的乘除运算关键是约分,约分的关键是找出公因式,约分时,分式的分子分母出现多
Core watersheds are the watersheds in which the integrals and fractionals are delimited by whether the denominator contains letters or not.The arithmetic nature of powers is the basis of integral multiplication, which includes monomials and monomials, polynomials and polynomials, multiplication of polynomials and polynomials The form of multiplication formula.Form decomposition and integer multiplication is the opposite direction of the deformation, factorization of the main methods are to mention the common factor method and the formula method.Fractional addition and subtraction operation is the key to the key, the key points is to find The most common denominator; fractional multiplication and division of the key is about points, about the key point is to find the common cause, about points, fractional numerator and denominator appears more