" (ii) "x^(2)-y^(2)+6y-9

Factorise: 4x ^(2) - y ^(2)+ 6y-9.

The equation of the circle touching Y-axis at (0,3) and making intercept of 8 units on the axis (a) x^(2)+y^(2)-10x-6y-9=0 (b) x^(2)+y^(2)-10x-6y+9=0 (c) x^(2)+y^(2)+10x-6y-9=0 (d) x^(2)+y^(2)+10x+6y+9=0

If the equation of a circle of a circle is 10x^(2)-10x+y^(2)+6y=-9 , which of the following lines contains a diameter of the circle?

Which of the following line is a diameter of the circel x ^(2) + y^(2) -6x-8y-9=0 ?

Which of the following line is a diameter of the circel x ^(2) + y^(2) -6x-8y-9=0 ?

If the circles x^(2)+y^(2)=a^(2), x^(2)+y^(2)-6x-8y+9=0 touch externally then a=

If the circles x^(2)+y^(2)=a^(2), x^(2)+y^(2)-6x-8y+9=0 touch externally then a=

The total number of common tangentss of x^(2)+y^(2) -6x-8y+9=0 and x^(2)+y^(2)=1 is

The locus of the centre of the circle which cuts the circles x^(2) + y^(2) + 4x - 6y + 9 = 0 " and " x^(2) + y^(2) - 4x + 6y + 4 = 0 orthogonally is

The locus of the centre of the circle which cuts the circles x^(2) + y^(2) + 4x - 6y + 9 = 0 " and " x^(2) + y^(2) - 5x + 4y + 2 = 0 orthogonally is