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OpenStudy (anonymous):
What is the product of the complex numbers (-3i+4) and (3i+4) ?
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OpenStudy (alexandervonhumboldt2):
(-3i+4)*(3i+4)=-9*(-1)-12i+12i+16=9+16=25
OpenStudy (jango_in_dtown):
(a+bi)(c+di)=(ac-bd)+i(ad+bc)
OpenStudy (alexandervonhumboldt2):
i^2=-1 remember
OpenStudy (anonymous):
thanks
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