find the value of the equation in the description given below

Asked by ashwinikumar59 | 5th Sep, 2010, 10:07: AM

Expert Answer:

Let i +-i=xsquaring,x2 = (i +-i)2= i +(-i) +2-i2 =21      as i2=-1  x2=2  hence x =-2 or 2                                                        ">

Answered by  | 5th Sep, 2010, 11:32: AM

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