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Mathematics 19 Online
OpenStudy (anonymous):

@Michele_Laino

OpenStudy (michele_laino):

please try this substitution: \[x ^{2}-3=t\]

OpenStudy (michele_laino):

ok!

OpenStudy (michele_laino):

yes! it is C

OpenStudy (michele_laino):

ok!

OpenStudy (anonymous):

it is either B or D right? what did you get?

OpenStudy (michele_laino):

please, wait, I'm trying...

OpenStudy (anonymous):

okk

OpenStudy (michele_laino):

I think C, but I'm not sure completely

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