Median of observations `x_i`, such that `(x_i^2-7x_i+12)(x_i^3-x_i^2-4x_i+4)=0` will be

If x_1, x_2, .....x_n are n observations such that sum_(i=1)^n (x_i)^2=400 and sum_(i=1)^n x_i=100 then possible values of n among the following is

x_1,x_2, x_3,………., x_n are n observations . sum_(i=1)^(n) (x_i - 2) = 100 " and " sum_(i=1)^(n) (x_i - 5) = 20 then mean barx = …….

(x+iy)(2-3i)=4+i

Solve: i x^2-3x-2i=0,

Solve: i x^2-3x-2i=0,

Solve: i x^2-3x-2i=0,

Solve: i x^2-3x-2i=0,

Find x and y if (x^4+2x i)-(3x^2+y i)=(3-5i)+(1+2y i)