If the area of the circle 4x2-4y2-8x-16y-k-0 is 9- sq- units- then k-

The correct option is D 16 Given equation of circle is 4 x^2+4 y^2 8 x+16 y+k=0 x^2+y^2 2 x+4 y+k/4=0 Radius of the circle is r=√(( 1)^2+(2)^2 k ...

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Equation of Circle with (h,k) as Center

If the area o...

Question

If the area of the circle $4 x^{2} + 4 y^{2} - 8 x + 16 y + k = 0$ is $9 π s q . u n i t s$ , then $k =$

4

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