Question

Center of the circle Q is on Y axis.And the Circle passes through points (0,7) and (0, -1). Circle intersects at positive X -axis at (P,0). What is the value pf 'P'? Pls help..

Answer 1

Equation of the circle passing through two points

(x-x1)(x-x2)+(y-y1)(y-y2)=0

Now put the values to get equation of the circle.

Let say its x^2+y^2+2gx+2fy+c=0

Now we know at x axis y=0

Hence put y=0 in your circle equation and get x value and that will be value of P.