Equation of pair of tangents

A pair of tangents are drawn from the origin to the circle x^(2)+y^(2)+20(x+y)+20=0, The equation of pair of tangent is

A pair of tangents are drawn from the origin to the circle x^2 + y^2 + 20x +20y + 20 = 0 , The equation of pair of tangent is

" The equation of pair of tangent to the ellipse S=0 from (x_(1),y_(1)) is

Combined equation of pair of tangent to the hyperbola x^(2) - y^(2) = 8 " is " 8x^(2) - 7y^(2) - 16x + 8 = 0 and equation of chord of contect is x = lambda , then value of lambda is __________

Combined equation of pair of tangent to the hyperbola x^(2) - y^(2) = 8 " is " 8x^(2) - 7y^(2) - 16x + 8 = 0 and equation of chord of contect is x = lambda , then value of lambda is __________

Let 2x^(2)+y^(2)-3xy=0 be the equation of a pair of tangents drawn from the origin O to a circle of radius 3 with centre in the first quadrant.If A is one of the points of contact, then the length of OA is

Let 2x^2 + y^2- 3xy = 0 be the equation of a pair of tangents drawn from the origin O to a circle of radius 3 with centre in the first quadrant. If A is one of the points of contact, find the length of OA.

Let 2x^(2)+y^(2)-3xy=0 be the equation of a pair of tangents drawn from the origin O to a circle of radius 3 with centre in the firs quadrant. If A is one of the points of contact, find the length of OA.

Find the equation of the pair of tangents from (10,4) to the circle x^(2)+y^(2) = 25 .

Find the equation of the pair of tangents drawn from (-1,2) to the hyperola 2x^(2)-3y^(2)=1 .