" (A) "25-4y^(2)+21y

factoraization 25-4y ^ (2) + 21y

The foci of the ellipse 25 x ^(2) + 4y ^(2) + 100x -4y + 100 =0 are

The foci of the ellipse 25 x ^(2) + 4y ^(2) + 100x -4y + 100 =0 are

The eccentricity of the ellipse 25 x^(2) + 4y^(2) = 100 is _

I. 4x^(2) = 25" " II. 2y^(2) - 13y + 21 = 0

Line 3x + 4y = 25 touches the circle x^(2) + y^(2) = 25 at the point

(3,-4) is the point to which the origin is shifted and the transformed equation is X^(2)+Y^(2)=4 then the original equation is (A) x^(2)+y^(2)+6x+8y+21=0 (B) x^(2)+y^(2)+6x+8y-21,=0 (C) x^(2)+y^(2)-6x+8y+21=0 (D) x^(2)+y^(2)-6x-8y+21=0

The point of contact 4x-5y+25=0 with the ellipse 9x^(2)+25y^(2)=225 is