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Mathematics 11 Online
OpenStudy (anonymous):

HELP PLEASE!!!

OpenStudy (anonymous):

\[\frac{ 12 }{ x-5 }+\frac{ 2 }{ x+4 }\]

jimthompson5910 (jim_thompson5910):

how far did you get?

OpenStudy (anonymous):

Well at first I thought I had to get the LCM right? then I had to get the LCD but I don't know what the LCM is so how do I get the LCD. I know how to solve it its just idk what the LCM is.

jimthompson5910 (jim_thompson5910):

in this case, the LCD is (x-5)(x+4)

OpenStudy (anonymous):

oh how did you get that?

jimthompson5910 (jim_thompson5910):

just multiply the denominators and divide by 1 (the GCF)

OpenStudy (anonymous):

Ah ok THANK YOU!!!!!^-^

jimthompson5910 (jim_thompson5910):

you're welcome

jimthompson5910 (jim_thompson5910):

tell me what answer you get

OpenStudy (anonymous):

idk if its right thoe: \[\frac{ 14 }{ (z-5)(z+4) }\]

jimthompson5910 (jim_thompson5910):

that's incorrect

OpenStudy (anonymous):

I got two answers: that one and \[\frac{ 2(7z+19) }{ (z-5)(z+4) }\]

jimthompson5910 (jim_thompson5910):

that one is correct

jimthompson5910 (jim_thompson5910):

\[\large \frac{ 12 }{ x-5 }+\frac{ 2 }{ x+4 }\] \[\large \frac{ 12(x+4) }{ (x-5)(x+4) }+\frac{ 2 }{ x+4 }\] \[\large \frac{ 12x+48 }{ (x-5)(x+4) }+\frac{ 2 }{ x+4 }\] \[\large \frac{ 12x+48 }{ (x-5)(x+4) }+\frac{ 2(x-5) }{ (x+4)(x-5) }\] \[\large \frac{ 12x+48 }{ (x-5)(x+4) }+\frac{ 2x-10 }{ (x-5)(x+4) }\] \[\large \frac{ 12x+48 + 2x-10 }{ (x-5)(x+4) }\] \[\large \frac{ 14x+38 }{ (x-5)(x+4) }\] \[\large \frac{ 2(7x+19) }{ (x-5)(x+4) }\]

OpenStudy (anonymous):

Oh THANKS!!! =3

jimthompson5910 (jim_thompson5910):

np

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