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OpenStudy (anonymous):
multiply complex conjugates (4+3i)(4-3i)
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OpenStudy (anonymous):
you would have to know that \[\large (a+b)(a-b)=a^2-b^2\]
OpenStudy (anonymous):
applying that fact to your question what do you get??
OpenStudy (anonymous):
7
OpenStudy (anonymous):
right?
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