Mathematics
10 Online
OpenStudy (theraggedydoctor):
\(x^2-2x+3=x^3+2x+x^2\) is equivalent to
\(0\)
\(2x^2-4x=0\)
\(-x^3+4x-3=0\)
\(x^3-2x^2-3=0\)
\(x^3+4x-3=0\)
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OpenStudy (loser66):
YOur idea?
OpenStudy (welshfella):
subtract x^2 , -2x and 3 in turn from the left hand side and see what you get
OpenStudy (theraggedydoctor):
Okay. Hold on..
OpenStudy (mayankdevnani):
what do you think ?
OpenStudy (theraggedydoctor):
I really dont know.
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OpenStudy (mayankdevnani):
\[\large \bf x^2-2x+3=x^3+2x+x^2\]
first subtract x^2 to both sides,
OpenStudy (mayankdevnani):
what we get ?
OpenStudy (theraggedydoctor):
\(x^2\) cancels out..
OpenStudy (anonymous):
Equivalent to 0
OpenStudy (theraggedydoctor):
How? Show me..
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OpenStudy (mayankdevnani):
when x^2 cancels out , we get
\[\large \bf -2x+3=x^3+2x\]
Add 2x to both the sides
OpenStudy (mayankdevnani):
what we get ?
OpenStudy (theraggedydoctor):
We get..
\(-2x+2x+3=x^3\)
OpenStudy (mayankdevnani):
nope !
try again
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OpenStudy (theraggedydoctor):
But I added the \(2x\) from the other side..
OpenStudy (theraggedydoctor):
Oh.. to both sides.
@mayankdevnani
OpenStudy (theraggedydoctor):
I got \(4x\) on the right side.
OpenStudy (mayankdevnani):
so we get
\[\large \bf 3=x^3+4x\]
now subtract 3 to both sides,we get
\[\large \bf x^3+4x-3=0=\color{red}{Answer}\]
OpenStudy (mayankdevnani):
hope you understand ! @TheRaggedyDoctor
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OpenStudy (theraggedydoctor):
Oh, okay. Thank you. Yes! I understood.
OpenStudy (mayankdevnani):
your welcome :)