Math miscellaneousEasy
Question
If z = x - i y and 
= p + iq , then 
is equal to
= p + iq , then is equal toOptions
A.1
B.-2
C.2
D.-1
Solution
z = (p + iq)3 = p(p2 - 3q2) - iq(q2 - 3p2)
⇒
= p2 - 3q2 & 
= q2 - 3p2 ⇒ 
= - 2
⇒
= p2 - 3q2 & = q2 - 3p2 ⇒ = - 2Create a free account to view solution
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