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Mathematics

OpenStudy (anonymous):

âˆš-49 ________________ (7 - 2i)-(4 + 9i)

jhonyy9 (jhonyy9):

do you know what is sqrt(-1) ?

jhonyy9 (jhonyy9):

can you calcule with complex numbers ?

OpenStudy (anonymous):

I just figured it out lol

jhonyy9 (jhonyy9):

add the same terms like 7-4 and -2i-9i

jhonyy9 (jhonyy9):

so and do you know the right answer ?

OpenStudy (anonymous):

yes

jhonyy9 (jhonyy9):

how many is i^2 = ?

jhonyy9 (jhonyy9):

so in numerator will have -7 right ?

jhonyy9 (jhonyy9):

not is the right numerator is 7i

jhonyy9 (jhonyy9):

7i ------ 3-11i

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