(1)计算:(a2−4a2−4a+4+2−aa+2)÷a/a−2; (2)解方程:3/2x−2+1/1−x=3.
问题描述:
(1)计算:(
+
a2−4
a2−4a+4
)÷2−a a+2
;a a−2
(2)解方程:
+3 2x−2
=3. 1 1−x
答
(1)原式=[(a+2)(a−2)(a−2)2+2−aa+2]÷aa−2=(a+2a−2+2−aa+2)÷aa−2=((a+2)2−(a−2)2(a+2)(a−2)÷aa−2=8a(a+2)(a−2)×a−2a=8a+2;(2)方程两边都乘2(x-1)得3-2=3×2(x-1)得解得x=76.经检验:x=...