计算 x-2分之x方+1-2-x分之3-4x (x+y)x方-y方分之x方+y-x分之y方

问题描述:

计算 x-2分之x方+1-2-x分之3-4x (x+y)x方-y方分之x方+y-x分之y方

计算 x-2分之x方+1-2-x分之3-4x =(x²+1)/(x-2)-(4x-3)/(x-2)=(x²+1-4x+3)/(x-2)=(x-2)²/(x-2)=x-2(x+y)x方-y方分之x方+y-x分之y方=(x+y)×x²/(x+y)(x-y)-y²/(x-y)=x²/(x-y)-y²...x方-2xy+y方分之x四次方-x方y方除以y方分之x方+xy乘x方分之y方a+2分之a-2-a方+4a+a分之a方-a除以a+2分之a-4