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OpenStudy (hba):
Find the real number a such that 7 – i = (2 – i)(a + i) A) –3 B) 3 C) –2 D) 2 _______________________________________________________________________________________________
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OpenStudy (anonymous):
The RHS becomes \(2a+2i-ai-i^2\) where \(i^2=-1\) So, \(7-i=2a+2i-ai+1\) Solve for a Note: take i like any other variable. It will cancel out.
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