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CAN SOMEONE PLEASE HELP ME!! Convert x 2 + y 2 = 8 to a polar equation. r = 4 r² = 8 r² = 64

Mathematics
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is r the given?
yes r is 8 its based off the formula x^2+y^2=8
i think its the last one r^2=64 r=8

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Other answers:

x^2+y^2=8 ==> r^2=8
how can r^2 be both 8 and 64?
r^2=8
|dw:1365741494311:dw|
r^3=64
8^2=64
no but when you are converting to a polar equation \[r=\sqrt{x^2+y^2}\]
therefore \[r^2=x^2+y^2\]
so you are replacing the \[x^2+y^2 \]
with \[r^2\]
r^2=8
?
yes you are converting from a rectangular equation to a polar equation
that's what is stated in the question to do
thx
but if you teacher wants r itself then r is \[r=2\sqrt{2}\]
r cant be 4 because you have are taking the root of 8 not halving it
ok

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