Question

The area of the circle
x2 + y2 - 4x – 2y + k = 0 is 25
$\pi$
square
units then k=​

Answer 1

x2+y2+4x+2y+k=0

x2+4x+22−22+y2+2y+12−12+k=0

(x+2)2+(y+1)2−5+k=0

(x+2)2+(y+1)2=5−k

(x+2)2+(y+1)2=(5−k)2

Comparing with the standard form of equation of circle (x−h)2+(y−k)2=l2, we get r=5−k

Area of circle =5πcm2

πr2=5π

π(5−k)=5π

5−k=5

5−5=k

k=0

Answer 2

Step-by-step explanation:

here answer is k equal 0