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OpenStudy (anonymous):
I HATE THESE Rationalize the denominator of 4 over quantity 2 plus 7 i
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OpenStudy (anonymous):
|dw:1331759604598:dw|
OpenStudy (anonymous):
Think difference of squares for the denominator. So multiply \[4/(2+7i) \] by\[(2-7i)/(2-7i)\]
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