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Mathematics 22 Online
OpenStudy (anonymous):

Simplify the expression

OpenStudy (anonymous):

\[\frac{ \sqrt{1} }{ (4-3i)-(2+5i) }\]

OpenStudy (anonymous):

@iGreen

OpenStudy (anonymous):

its -1 not 1

OpenStudy (igreen):

Oh, okay.

OpenStudy (igreen):

The square root of -1 is i.

OpenStudy (anonymous):

I got \[\frac{ -4+i }{ 4 }\]

OpenStudy (igreen):

\(\dfrac{i}{(4 - 3i) - (2 + 5i)}\) Subtract the denominator: \(\dfrac{i}{2 - 8i}\) Can you simplify that?

OpenStudy (igreen):

Is that one of your choices..or do you have to simplify it more?

OpenStudy (igreen):

Do you have choices?

OpenStudy (anonymous):

the choices are 15-8i/40, -4+i/34, 15-8i/79 and -4+1/4

OpenStudy (igreen):

\(\dfrac{i}{2-8i} = \dfrac{-4+i}{34}\)

OpenStudy (igreen):

So that's your answer.

OpenStudy (anonymous):

thanks

OpenStudy (igreen):

No problem.

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