Mathematics
6 Online
OpenStudy (anonymous):
Solve the equation (y+2/y)^2 + 3(y+2/y) = 4 using substitution method.
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OpenStudy (eyust707):
hmm do you know what the substitution method is?
OpenStudy (anonymous):
yea
OpenStudy (eyust707):
what is it i honestly forgot..
OpenStudy (eyust707):
hmm i was reading that its when you have 2 variables, solve for one, then sub tht one into the other..
OpenStudy (anonymous):
yea i was gettin u an exact definition
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OpenStudy (eyust707):
ok ok
OpenStudy (eyust707):
well we could say that (y+2/y) ^2 = 1
OpenStudy (anonymous):
ok
OpenStudy (eyust707):
if you notice that would solve it.
OpenStudy (eyust707):
actually no nvm
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OpenStudy (eyust707):
thats not right... lol i can solve it how i normally would but not sure what they mean by substiution
OpenStudy (eyust707):
ohh maybe they want you to say
x= (y + 2) / y
and that
x^2 + 3x = 4
OpenStudy (eyust707):
x^2 +3x -4 = 0
OpenStudy (anonymous):
ughh no clue
OpenStudy (eyust707):
(x +4) (x - 1) = 0
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OpenStudy (eyust707):
so x = -4
or x = 1
OpenStudy (eyust707):
well whats x?
OpenStudy (eyust707):
we said that in the begining
OpenStudy (eyust707):
x= (y + 2) / y
OpenStudy (eyust707):
(y + 2) / y = 4
and
(y + 2) / y = -1
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OpenStudy (eyust707):
solve for y
OpenStudy (eyust707):
that used substituion cause i subbed in y for x =)
OpenStudy (anonymous):
wait which one is right
OpenStudy (eyust707):
there are two possible answers tht satifiy the equation
OpenStudy (anonymous):
ok thanks lol i suck at math
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OpenStudy (eyust707):
its coo lol if you want call me on skype we could prolly mob thru way more problems.. ill prolly be on for the next hour or so
OpenStudy (anonymous):
yay cus i got like 4 problems left...wats ur skype name
OpenStudy (eyust707):
its the same as on here eyust707
OpenStudy (anonymous):
ok sent it
OpenStudy (eyust707):
call mee
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OpenStudy (anonymous):
ok give me one min
OpenStudy (eyust707):
kk