Question

The equation of circle two of whose diameter are 3x + 4y - 7=0 and x-3y+2=0 and having area 154 cm^2 is

Answer 1

first solve the two diameter equation to get the centre of the circle then from the area given find out
$r {}^{2}$
and then put it in the circle equation
i.e

(x - a)^2 + (y - b)^2 = (radius)^2