Express of the complex number in the form `a + i b`.`(1-i)^4` – InterviewSolution

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1.	Express of the complex number in the form `a + i b`.`(1-i)^4`
Answer» `(1-i)^4` `((1-i)^2)^2` `= (1^2 + i^2 - 2i)^2` `= (cancel(1) cancel(- 1) - 2i)^2` = `(-2i)^2` `=4i^2` `= 4(-1)` `=-4` so, a= -4 & b=0

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