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√(-49)/((7-2i)-(4+9i))
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??
Rationalize the denominator of
\[\sqrt{\frac{-49}{7-2i}-(4+9i)}\]
Squareroot of negative 49 over open ( ) 7 minus 2i close ( ) minus open ( ) plus 9i
rationalize it ... simplify it (-49)/(7-2i) *(7+2i)/(7+2i)
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not getting the correct answer....it's a multiple choice question
a.) -49+2i/-40 b.) 49+21i/58 c.) 77+21i/-2 d.) -77+21i/130
well you have wolfram
http://www.wolframalpha.com/input/?i=%E2%88%9A%28-49%29%2F%28%287-2i%29-%284%2B9i%29%29 tweak it as your needs
Thank you
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