[" If "(4x^(2)-3y^(2)):(2x^(2)+5y^(2))=12:19," then "(x;y)],[[" (a) "2:3," (b) "1:2],[" (c) "3:2," (d) "2:1]]

If (5x - 3y) : (2x + 4y) = 11 : 12 , then find x : y .

If (3x-y):x(4x+y)=5:12 then find (x^(2)+y^(2)):(x+y^(2))

The radical centre of the circles x^(2)+y^(2)=9 , x^(2)+y^(2)-2x-2y-5=0 , x^(2)+y^(2)+4x+6y-19=0 is A) (0,0) (B) (1,1) (C) (2,2) (D) (3,3)

If x^(4) + y^(4)=19 and x+y=1 find x^(2)y^(2)-2xy

If 4x^(2)+y^(2)=1 then the maximum value of 12x^(2)-3y^(2)+16xy is

3x^(2) + 8x +4=0, 4y^(2)-19y + 12=0

If (3x -4y) : (2x -3y) = (5x -6y) : (4x -5y) , find : x : y .