Show that a real value of x will satisfy the equation : 1-ix/1+ix=a-ib if asquare+bsquare=1

Show that a real value of x will satisfy the equation : 1-ix/1+ix=a-ib

1.	Show that a real value of x will satisfy the equation : 1-ix/1+ix=a-ib if asquare+bsquare=1
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