方程(x-1)=4的根是 A.3,-3 B.3,-1 C.2,-3 D.3,-2
问题描述:
方程(x-1)=4的根是 A.3,-3 B.3,-1 C.2,-3 D.3,-2
答
x-1=2或-2
x=3或-1
选B