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i've tried to do this at least 5 times. i don't understand it at all

|dw:1337656235090:dw|

|dw:1337656263685:dw|

|dw:1337656308816:dw|

or multiply the second equation by -4

|dw:1337656338440:dw|

|dw:1337656365038:dw|

|dw:1337656398578:dw|

\[4x^2+9y^2=72\]
\[-4(x^2-y^2)=-4(5)\]

|dw:1337656433069:dw|

there's supposed to be 2 solutions:
The solutions are:
(_,_) & (_,_)

\[4x^2+9y^2=72\]
\[-4x^2+4y^2=-20\]
add them together to get
\[13y^2=52\]

trust me, i've gotten all the solutions possible. but the answer is still wrong.

\[y^2=\sqrt{\frac{52}{13}}\]

the solutions are : sqrt(52/11) and sqrt(107/11)

but there's 4 solutions.

@ outkast i think y = sqrt(52/11) u wrote y^2 = sqrt(52/13) ?

yeah i think there might be aproblem with your's mine is correct i thinkkk let me check

yeah mine is correct .. by elimination

u can write it as : |dw:1337656633671:dw|

\[y=\pm2\]\[x=\pm3\]

i also got that ^

i'ma cheat *grabs calculator

lol, i've done that too! ^

ahh wait mathslover you have 7 instead of 9

i believe you made a 9 really badly and thought it was a 7
the first equation is
4x^2+9y^2=72

For y, I got y= +/- sqrt (52/13)

thats right now for x

yes sorry , y = + 2 , -2
x = +3 , -3

@Outkast3r09 x = +3 , -3 right ?

\[x^2-(2^2)=5\]
\[x^2-(-2^2)=5\]

x = +/- 3

\[x^2-4=5\]
\[x^2-4=5\]

\[\sqrt{52/13}=\pm2\]\[x ^{2}=9\]\[x=\pm3\]

I was slow, I was using a crappy calculator.

does this mean it's a multiplicity of 2?

@thejoshfish did you try putting in y= +/- sqrt (52/13) and x=+/- 3?

@Outkast3r09 it means 3*3 and (-3)(-3).

i sure did. haha trust me, i tried everything. i'm so fed up.
but you guys are wonderful.

those are your answers are you using like owl or whatever

owl?

Online web learning

what does it say the answers are josh?

alpha omega academy

it doesn't tell me. but thanks for helping.