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OpenStudy (anonymous):
(9-6i)(4-7i)
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OpenStudy (gorv):
(9-6i)*4-(9-6i)*7i
OpenStudy (gorv):
i*i=-1
OpenStudy (cwrw238):
= 9*4 -9*7i -6i*4 -6i*7i remember that i^2 = -1
OpenStudy (gorv):
would you try it ???
OpenStudy (anonymous):
i don know how sot solve the i^2
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OpenStudy (anonymous):
OpenStudy (anonymous):
thank you
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