Question

Coordinates of centre and radius of the circle $(x-3{)}^2+(y+4{)}^2=25$ are respectively

• A. $(3,4)$ , $25$
  
• B. $(-3,4)$ , $5$
• C. $(3,-4)$ , $5$
• D. $(3,-4)$ , $25$

Answer 1

The correct option is C $(3,-4)$ , $5$

$(x-3{)}^2+(y+4{)}^2=25$

$(x-3{)}^2+(y-(-4){)}^2-(5{)}^2$

$(x-4{)}^2+(y-k{)}^2-(r{)}^2$

$r=5(h,k)=(3,-4)$