Question

help plzz solve it for me​

Answer 1

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Answer 2

1.)2*i

2.)0.5+2i

Step-by-step explanation:

You can solve it by De Moivre's Theorem

This is the formula-

i= √-1

i²= -1

z= a+bi

(a+bi)+(c+di)=(a+c)+(b+d)i

(a+bi)-(c+di)=(a-c)+(b-d)i

(a+bi)(c+di)=(ac-bd)+(bc+ad)i

(a+bi)(a-bi)=a²+b²

|Z|=|a+b|=√x²+y²

z=(a+bi)=(a-bi)

In short De Moivre's Theorem-

[r(cos∅+isin∅)]"=r"(cos n∅+isin

n∅)]

Hint-It's a complex number question and the steps are lengthy. So to understand the question you can Google it or refer your book.