InsanelyChaotic
Please help me? :)
Rationalize the denominator of √-49/(7-2i) - (4+9i)
My answer: 49+21i/58
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RajshikharGupta
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plz put brackets after each expression so that ur ques get clear to me
InsanelyChaotic
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ok koala ;0
mark_o.
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√-49/(7-2i) - (4+9i)
is this like this?
\[\sqrt{(\frac{ -49 }{ 7-2i })}-(4+9i)?\]
mark_o.
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or is it like this?
\[\sqrt{\frac{ -49 }{ 7-2i }-(4+9i)}?\]
InsanelyChaotic
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yes!!! :))
mark_o.
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or is it like this?
\[\sqrt{\frac{ -49 }{(7-2i)-(4+9i) }}\]?
mark_o.
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which one now? the first, second or the third?
InsanelyChaotic
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the former was correct ;)
InsanelyChaotic
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the first one :)
mark_o.
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ok the first one is
\[\sqrt{\frac{ -49 }{ 7-2i }( \frac{ 7+2i }{ 7+2i })}-(4+9i)\]
\[\sqrt{\frac{ -49(7+2i) }{ 49-4i ^{2} }}-(4+9i)\]
\[\sqrt{\frac{ -49(7+2i) }{ 49-4(-1) }}-(4+9i)\]
can you further simplify them ?
InsanelyChaotic
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No
mark_o.
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= sqrt[(-343-98i)/53]-(4+9i)
=sqrt[-6.472-1.85i]-(4+9i)
mark_o.
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ok i think we cant simplify them any more :D
InsanelyChaotic
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thank you kind sir!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11111
mark_o.
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ok YW have fun now and good luck ... :D