Answer:
[tex](x+2.3)^{2} +y^{2} =36/49[/tex]
Step-by-step explanation:
To get the equation of a circle we plug your information into this equation:
[tex](x-h)^{2} +(y-k)^{2} =r^{2}[/tex]
Your h is the x coordinate of the center, -2.3 and your k is the y coordinate of the center, 0. The r is your radius. So we plug these values in to get [tex](x+2.3)^{2} +y^{2} =(6/7)^{2}[/tex] which then gives us the final answer of [tex](x+2.3)^{2} +y^{2} =36/49[/tex].