Kružnica

$$x^2+y^2-6x+4y-12=0$$

$$x^2+y^2+2x-12y-28=0$$

$$x^2+y^2-49=0$$

$$\left(x-2\right)^2+y^2-25=0$$

$$\left(x+5\right)^2+\left(y-3\right)^2=64$$

$$\left(x+5\right)^2+\left(y-3\right)^2=9$$

$$\left(x-2\right)^2+\left(y-6\right)^2=4$$

$$\left(x-1\right)^2+\left(y+3\right)^2=7$$

$$\left(x+4\right)^2+\left(y-7\right)^2=37$$

$$\left(x+4\right)^2+\left(y-7\right)^2=25$$

$$\left(x-7\right)^2+\left(y+4\right)^2=49$$

$$\left(x-7\right)^2+\left(y+4\right)^2=37$$

$$\left(x-3\right)^2+\left(y-4\right)^2=8$$

$$\left(x-5\right)^2+\left(y-4\right)^2=8$$

$$\left(x-5\right)^2+\left(y-4\right)^2=10$$

$$\left(x-1\right)^2+\left(y-3\right)^2=10$$

$$\left(x-5\right)^2+\left(y-5\right)^2=25$$

$$\left(x-5\right)^2+\left(y-4\right)^2=25$$

$$\left(x+5\right)^2+\left(y+5\right)^2=5$$

$$\left(x+5\right)^2+\left(y-5\right)^2=25$$

$$\left(x-5\right)^2+\left(y-4\right)^2=25$$

$$\left(x-3\right)^2+\left(y-4\right)^2=10$$

$$\left(x-2\right)^2+\left(y-5\right)^2=10$$

$$\left(x-4\right)^2+\left(y-5\right)^2=25$$

Istina

Laž

$$r=7,\ S\left(-2,3\right)$$

$$r=7,\ S\left(2,4\right)$$

$$r=5,\ S\left(-2,3\right)$$

$$r=7,\ S\left(2,-3\right)$$

x-os

y-os