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Mathematics 7 Online
OpenStudy (anonymous):

:)

OpenStudy (gorv):

\[\frac{ x (x+8)+20*(x+2)}{ (x+2)(x+8) }= 2\]

OpenStudy (gorv):

x(x+8)+20(x+2)=2(x+2)(x+8) now open the bracket and do further calculations

OpenStudy (gorv):

yeah -x^2+8x+8=0 or x^2-8x-8=0

OpenStudy (gorv):

solve the equation now

OpenStudy (joannablackwelder):

I don't get that exactly. I get \[x=4 \pm 2\sqrt{2}\]

OpenStudy (joannablackwelder):

\[\frac{ -(-8) \pm \sqrt{64-4*8} }{ 2 }\]

OpenStudy (joannablackwelder):

\[\frac{ 8 \pm \sqrt{32} }{ 2 }\]

OpenStudy (joannablackwelder):

Making sense, @EcoBoost ?

OpenStudy (joannablackwelder):

Ok. Let me know if you got to here. :)

OpenStudy (joannablackwelder):

Oh wait!

OpenStudy (joannablackwelder):

I didn't plug in my c as negative!

OpenStudy (joannablackwelder):

I used the second one.

OpenStudy (joannablackwelder):

I like for the coefficient of x^2 to be positive.

OpenStudy (joannablackwelder):

But either one works :)

OpenStudy (joannablackwelder):

And now I get \[4 \pm 2\sqrt{6}\]

OpenStudy (joannablackwelder):

No worries :)

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