Question

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Answer 1

Answer:

${(1 - i)}^{4} \\ = (1 - i) {}^{2} \times (1 - i) {}^{2} \\ = (1 - 2i + {i}^{2} ) {}^{2} \\ < < i {}^{2} = - 1 > > \\ (1 - 2i - 1) {}^{2} \\ = (- 2i) {}^{2} = 4i {}^{2} = - 4$