Mathematics - Circle Question with Solution | TestHub

Let the circle $C_1:x^2+y^2-2(x+y)+1=0$ and $C_2$ be a circle having centre at $(-1,0)$ and radius 2 . If the line of the common chord of ${\mathrm{C}}_1$ and ${\mathrm{C}}_2$ intersects the $y$-axis at the point $\mathrm{P}$, then the square of the distance of $\mathrm{P}$ from the centre of ${\mathrm{C}}_1$ is :