Mathematics
21 Online
OpenStudy (anonymous):
how to solve for y?
\[(x-y)(x-y)=9\]
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OpenStudy (unklerhaukus):
\[(x-y)(x-y)=9\]
\[(x-y)^2=3^2\]
\[\qquad=\]
OpenStudy (tyteen4a03):
You cannot solve for y because there are 2 variables yet there are only 1 equation. Do you mean change of subject?
OpenStudy (lgbasallote):
here comes the race...
OpenStudy (tyteen4a03):
@Igbsallote those are fun
OpenStudy (anonymous):
so then sqrt and get x-y=3 and so y = x-3
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OpenStudy (anonymous):
and y=x+3 also
OpenStudy (anonymous):
yes? :D
OpenStudy (unklerhaukus):
\[\LARGE\color{red}{\checkmark\checkmark}\]
OpenStudy (anonymous):
okay can you help me factor \[x^2-3xy-4y^2=0\]
OpenStudy (anonymous):
(x+y)(x-4y)?
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hartnn (hartnn):
\(\LARGE\color{red}{\checkmark\checkmark}\)
OpenStudy (anonymous):
lol okay so if i was to solve that for y i would get...
x+y=4y+x
now what? :|
hartnn (hartnn):
(x+y)(x-4y) =0
x+y= 0 or x-4y = 0
OpenStudy (anonymous):
ooohhh :O
okay so y=x or y=-1/4x
OpenStudy (anonymous):
y=-x*
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hartnn (hartnn):
x+y=0
y=-x
x-4y=0
y= x/4
OpenStudy (anonymous):
yup yup...col i was right ^_^
OpenStudy (anonymous):
cool* ...wow lol
hartnn (hartnn):
next question...
OpenStudy (lgbasallote):
someone took a detour and suddenly appeared in the race out of nowhere
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OpenStudy (anonymous):
lol...ill post the next one when i have one..thanks guys! :)
hartnn (hartnn):
its no race for me
hartnn (hartnn):
welcome ^_^
OpenStudy (lgbasallote):
that's what they all say
OpenStudy (anonymous):
lol wut?
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OpenStudy (tyteen4a03):
@lgbasallote Oh the irony :P
OpenStudy (lgbasallote):
where's the irony?
OpenStudy (tyteen4a03):
@lgbasallote Do I need to be that obvious? *wink*
OpenStudy (lgbasallote):
im not racing with any of you....
OpenStudy (lgbasallote):
i don't reply when someone else is replying
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OpenStudy (anonymous):
@tyteen4a03 ur tryin way to hard buddy
OpenStudy (anonymous):
lol okay one last one...you guys have 4 minutes to explain it to me
OpenStudy (anonymous):
\[{3x+5}\over{6y-1}\] solve for y
OpenStudy (anonymous):
3y*
OpenStudy (unklerhaukus):
thats not an equation
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OpenStudy (lgbasallote):
will the equation self-destruct if they cant solve it in 4 minutes?
OpenStudy (anonymous):
okay lemme write that again...
\[x={{3y-5}\over{6y-1}}\]
OpenStudy (anonymous):
solve for y.....and i leave in 3 minutes thats why
OpenStudy (anonymous):
its +5...sorry
OpenStudy (anonymous):
3y+5
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OpenStudy (unklerhaukus):
multiply by the denominator
OpenStudy (tyteen4a03):
@yummydum I'm trying what? :P
OpenStudy (anonymous):
that gives \[{18y^2+29y-5}\over {36y^2+12y+1}\]
OpenStudy (unklerhaukus):
agh, not what i ment
OpenStudy (anonymous):
:\
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OpenStudy (anonymous):
im confused
OpenStudy (unklerhaukus):
\[x={{3y-5}\over{6y-1}}\]
\[(6y-1)\times x=(6y-1)\times{{3y-5}\over{6y-1}}\]
\[(6y-1)\times x=3y-5\]
OpenStudy (anonymous):
ohhh
OpenStudy (anonymous):
6xy-x=3y-5
now what?
OpenStudy (unklerhaukus):
actually was it plus five or minus?
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OpenStudy (anonymous):
+5
OpenStudy (anonymous):
what do i do from\[6xy-x=3y+5\]
OpenStudy (unklerhaukus):
minus five from both sides
OpenStudy (unklerhaukus):
minus 6xy from both sides
OpenStudy (anonymous):
\[-x-5=3y-6xy\]\[-x-5=y(-6x+3)\]\[{{-x-5}\over{-6x+3}}~~~=y\]\[y={{x+5}\over{6x-3}}\]
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OpenStudy (anonymous):
you rock...i need to sleep...stay blessed bro....g'nite! :P
OpenStudy (unklerhaukus):
great work !