(1)10/X+6/(X+10)=1
问题描述:
(1)10/X+6/(X+10)=1
(2)(X-6)(X-4)/X^2=14/25
答
10x+100+6x=x"+10x x"-6x-100=0 x"-6x+9=109 (x-3)"=109 X=109开方+3 (2)14X"=25X"-250X+600 11X"-250X"+600=0 (11X-30)(X-20)=0 11X-30=0或X-20=0 X=30/11或X=20