【正文】
rator and the denominator of an algebraic fraction by the same nonzero integral expression, the value of the algebraic fraction remains the same. 用式子表示是: ( M≠0) MBMABAMBMABA?????? , 分式 的基本性質(zhì): The basic properties of algebraic fractions 例 1 填空: ( 1) ( 2) ? ? 32 xxyx? ? ?3abbab6a 2??3y 2a2+2ab 練習(xí) 1 填空 : )(acb