Question

if a belongs to real, root of ia square = root I square asquare =​

Answer 1

Answer:

if z=a+ib zbar=a-ib then

$zz bar = a {}^{2} - i {}^{2} b {}^{2} \\ a { }^{2} -( - b {}^{2} ) = a { }^{2} + b {}^{2}$