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Mathematics
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you want help or the answer?
how do you find the extraneous root? I need help finding it

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cross multiply |dw:1352736853722:dw|
done... is this how i find the extraneous root?
I have y =5 already
y = 5 is correct
i only need help finding the EXTRANEOUS ROOT
\[\frac{ 1 }{ y-1 }=\frac{ 2 }{ y+2 }....where...y \neq1 ,-2\]\[2(y-1)=y+2\]\[2y-2=y+2\]\[y=4\]
EXTRAneous roots are roots that are introduced as a byproduct of running thru the algebra. they are values which can be produced thru the algebraic manipulations but are not accepted as solutions to the problem
Thus the answers will be y= 1 and y = -2?
how do yu identify if i have any in this problem?
extra roots tend to be the result of needing to square something to produce an outcome. 2y-4 = y+1 only has one solution, when y=5

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