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mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356499621903:dw
 one year ago

Rosy95 Group TitleBest ResponseYou've already chosen the best response.0
When i punched it into a calculator, it told me it was 2+2i
 one year ago

Raja99 Group TitleBest ResponseYou've already chosen the best response.0
in order to simplify this type of equations rationalizing the denominator allows to get a simple equation
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Here you need to get rid of i from the denominator. To do that, you need to multiply the denominator by its complex conjugate. The complex conjugate of a + bi is a  bi Since you are working with a fraction, whatever you multiply the denominator by, you must multiply the numerator by the same thing.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
The complex conjugate of 1 + 5i is 1  5i (1  5i)/(1  5i) = 1 becasue when you divide a number by itself (except 0) you get 1.
 one year ago

fortytwo Group TitleBest ResponseYou've already chosen the best response.0
okay so 1 8i?
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
So by multiplying your original fraction by (1  5i)/(1  5i) you are not changing the value, only the form.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356499890726:dw
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356500006418:dw
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356500358308:dw
 one year ago

fortytwo Group TitleBest ResponseYou've already chosen the best response.0
so the answer is 1/2  1/2i
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356500446208:dw
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Correct
 one year ago

fortytwo Group TitleBest ResponseYou've already chosen the best response.0
thank you
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
wlcm
 one year ago
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