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OpenStudy (anonymous):
Please help! how do you rationalize 4/7+3i??
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OpenStudy (anonymous):
4 / (7 + 3i) = (4(7 - 3i)) / ((7 + 3i)(7 - 3i)) = (28 - 12i) / (7^2 + 21i - 21i - 9i^2) = (28 - 12i) / (49 - 9(-1)) = (28 - 12i) / (49 + 9) = (28 - 12i) / 58 = (14 - 6i) / 29
OpenStudy (anonymous):
You're a life saver, thanks. I have one more, could you help?
OpenStudy (anonymous):
um...sure
OpenStudy (anonymous):
thanks, okay simply and change to radical form- (x^2/5)^3/4
OpenStudy (anonymous):
I got x^6/500...my teacher said I was wrong :/
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OpenStudy (anonymous):
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