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OpenStudy (anonymous):
what is one of the roots of (z-9)^2=-4
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OpenStudy (anonymous):
z=9+2i
OpenStudy (anonymous):
can you explain that to me please? :)
OpenStudy (anonymous):
z-9 =sqrt(-4) z= 9 +sqrt(-4) z= 9 +sqrt(4)*sqrt(-1) z= 9 +2*i
OpenStudy (anonymous):
thank you!
OpenStudy (anonymous):
and as the roots appear as conjugate so the other root will be 9 - 2i
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