Respuesta:
[tex]x^{2} + y^{2} - 4x - 2y + 1= 0[/tex]
2.Explicación paso a paso:
[tex]C(2, 1) r= 2\\(x - h)^{2} + (y - k)^{2}= r^{2}\\(x - 2)^{2} + (y - 1)^{2}= 2^{2}\\x^{2} - 2 x 2 + 2^{2}+ y^{2} - 2 x y x 1 + 1^{2}= 4x^{2} - 4x + 4 + y^{2} - 2x + 1= 4\\x^{2} + y^{2} - 4x - 2y + 1= 0[/tex]
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Respuesta:
[tex]x^{2} + y^{2} - 4x - 2y + 1= 0[/tex]
2.Explicación paso a paso:
[tex]C(2, 1) r= 2\\(x - h)^{2} + (y - k)^{2}= r^{2}\\(x - 2)^{2} + (y - 1)^{2}= 2^{2}\\x^{2} - 2 x 2 + 2^{2}+ y^{2} - 2 x y x 1 + 1^{2}= 4x^{2} - 4x + 4 + y^{2} - 2x + 1= 4\\x^{2} + y^{2} - 4x - 2y + 1= 0[/tex]