Express ((x,y) such that `x^2+y^2=25` where, x,y in W} as a set of ordered paires.

Express {(x, y) x^2 + y^2 =100 , where x, y in w } as a set of ordered pairs.

If x+2i+15i^6y = 7x+i^3(y+4) , where x,y in R, then x+y =

If tangents are drawn to the circle x^2 +y^2=12 at the points where it intersects the circle x^2+y^2-5x+3y-2=0 , then the coordinates of the point of intersection of those tangents are

If [frac{3}{2}+i frac{sqrt3}{2}]^50 = 3^25(x-iy) ,where x,y are real and i=sqrt(-1) , then the order pair (x,y) is given by