The equation of two equal sides of an isosceles triangle are 7x - y + 3 = 0 and x + y - 3 = 0 and the third side passes through the point (1, -10). The equation of the third side is
1
y = √3x + 9 but not x2 - 9y2 = 0
2
3x + y + 7 = 0 but not x - 3y - 31 = 0
3
3x + y + 7 = 0 or x - 3y - 31 = 0
4
Neither 3x + y + 7 = 0 nor x - 3y - 31 = 0