minnie123
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minnie123
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surdawi
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you want help or the answer?
minnie123
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how do you find the extraneous root? I need help finding it
minnie123
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@surdawi
surdawi
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cross multiply |dw:1352736853722:dw|
minnie123
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done... is this how i find the extraneous root?
minnie123
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I have y =5 already
surdawi
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y = 5 is correct
minnie123
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i only need help finding the EXTRANEOUS ROOT
Zekarias
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\[\frac{ 1 }{ y-1 }=\frac{ 2 }{ y+2 }....where...y \neq1 ,-2\]\[2(y-1)=y+2\]\[2y-2=y+2\]\[y=4\]
amistre64
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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
Zekarias
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Thus the answers will be y= 1 and y = -2?
minnie123
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how do yu identify if i have any in this problem?
amistre64
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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