计算、解方程: (1)|-2|-(1+
(2)x(2x-5)=4x-10 |
(1)原式=2-1+2=3;
(2)原方程可化为:x(2x-5)-2(2x-5)=0,
(2x-5)(x-2)=0,
2x-5=0或x-2=0;
解得:x1=
,x2=2.5 2
计算、解方程: (1)|-2|-(1+
(2)x(2x-5)=4x-10 |
(1)原式=2-1+2=3;
(2)原方程可化为:x(2x-5)-2(2x-5)=0,
(2x-5)(x-2)=0,
2x-5=0或x-2=0;
解得:x1=
,x2=2.5 2