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08-12-2017
Mathematics

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what is the radius of a circle whose equation ?????

what is the radius of a circle whose equation class=

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zizoux07p0ac3m zizoux07p0ac3m

08-12-2017

[tex]r = \sqrt{ L^{2} + K^{2} -C} = \sqrt{ (-4)^{2} + (3)^{2} - 21 } = \sqrt{4} = 2[/tex]

where L is negative half the coefficient of x and K is negative half the coefficient of y and c is the term free of x and y

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