Question

绝对值的解方程已知| x |=3,求x已知|2x |=8,求x已知|x-1 |=2,求x

Answer 1

|x|=3

x1=3,x2=-3

|2x|=8

2x=8.或2x=-8

x1=4,x2=-4

|x-1|=2

x-1=2或x-1=-2

x1=3,x2=-1