1. Given $\frac { ( 1 - j ) ^ { 2 } } { z } = 1 + \mathrm { i }$ (where i is the imaginary unit), then the complex number $\mathrm { z } =$
1. Given $\frac { ( 1 - j ) ^ { 2 } } { z } = 1 + \mathrm { i }$ (where i is the imaginary unit), then the complex number $\mathrm { z } =$\\