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Mathematics 8 Online
OpenStudy (anonymous):

5i x 6i

OpenStudy (anonymous):

i dont get how to solve these kind of questions :s

OpenStudy (anonymous):

5*6 = -----?

OpenStudy (anonymous):

30

OpenStudy (anonymous):

you just multiply them?

OpenStudy (anonymous):

yes & i * i = --------?

OpenStudy (anonymous):

1

OpenStudy (anonymous):

No i^2 = -1 right ?

OpenStudy (anonymous):

square root 1?

OpenStudy (anonymous):

|dw:1399075324219:dw|

OpenStudy (anonymous):

Okay ?

OpenStudy (anonymous):

ohh ok

OpenStudy (anonymous):

So what would be the answer ?

OpenStudy (anonymous):

would it just be 30 then?

OpenStudy (anonymous):

multiply 30 by -1 = ----------?

OpenStudy (anonymous):

-30 but isnt i = 1

OpenStudy (anonymous):

yes correct i =sqrt(-1) & i^2 = -1

OpenStudy (anonymous):

ohh why do we multiply 30 by -1 and not 1

OpenStudy (anonymous):

see we have given 5 i * 6i = 30 * i^2 since i * i = i^2 right ?

OpenStudy (anonymous):

ohhh

OpenStudy (anonymous):

that makes sense :)

OpenStudy (anonymous):

:)

OpenStudy (anonymous):

thanks so much!

OpenStudy (anonymous):

You are welcome :)

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