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Chapter 5 Section 5.5

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Chapter 5 Section 5.5

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x 2 + y 2

13. Locus and Equations of Circles. (a) How do we identify the equations of circles?. (i) The coefficients of x 2 and y 2 must be the same ; (ii) No xy -terms; (iii) The degree is 2. x 2 + y 2. x 2 + y 2. x 2 + y 2 + Dx+Ey+F = 0. General Form x 2 + y 2 + Dx+Ey+F = 0.

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