Question

Please help me? :)
Rationalize the denominator of √-49/(7-2i) - (4+9i)

My answer: 49+21i/58

Answer 1

plz put brackets after each expression so that ur ques get clear to me

Answer 2

ok koala ;0

Answer 3

√-49/(7-2i) - (4+9i)
is this like this?
\[\sqrt{(\frac{ -49 }{ 7-2i })}-(4+9i)?\]

Answer 4

or is it like this?
\[\sqrt{\frac{ -49 }{ 7-2i }-(4+9i)}?\]

Answer 5

yes!!! :))

Answer 6

or is it like this?
\[\sqrt{\frac{ -49 }{(7-2i)-(4+9i) }}\]?

Answer 7

which one now? the first, second or the third?

Answer 8

the former was correct ;)

Answer 9

the first one :)

Answer 10

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 ?

Answer 11

No

Answer 12

= sqrt[(-343-98i)/53]-(4+9i)
=sqrt[-6.472-1.85i]-(4+9i)

Answer 13

ok i think we cant simplify them any more :D

Answer 14

thank you kind sir!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11111

Answer 15

ok YW have fun now and good luck ... :D