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OpenStudy (anonymous):
(1/4-1/5i)(4/5+4/5i) MULTIPLY!
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OpenStudy (anonymous):
\[(a+bi)(c+di)=(ac-bd)+(ad+bc)i\]
OpenStudy (anonymous):
How is it with the i (imaginary number)
OpenStudy (anonymous):
1/4 * 4/5 = 17/20 ?
OpenStudy (anonymous):
17/20 + 17/20i - 16/20i - 16/20 ?
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