PunkFanChick
what is the length of the diameter of the circle x^2+y^214x+40=0? Seriously



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Algebraic!
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were you able to rearrange it so it's in the form f(x)^2 +f(y)^2 =r^2 ?

PunkFanChick
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no

Algebraic!
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complete the square on the terms with 'x' in them...

Algebraic!
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x^2 14x + ?

Algebraic!
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remember completing the square? from algebra?
(x7)(x7)  ___

PunkFanChick
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Okay I got it

Algebraic!
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you got the answer?