Nozie6338 Nozie6338

11-06-2017
Mathematics

contestada

The equation for the circle is:

x2+y2+14x+10y−7=0 .

What is the center of the circle?

Respuesta :

minimangalsathyan minimangalsathyan

13-06-2017

use completion of sq method
x^2+y^2+14x+10y-7=0
(x+7)^2+(y+5)^2=7+49+25
(x+7)^2+(y+5)^2=81
so centre is(-7,-5) radius is9

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