Question

if `[x,y][(x),(y)]` = [25]  and `[-x, y][(2x),(y)] = [-2]` find x and y if `x, y  ε  W` (whole numbers)

Answer 1

`[(x,y)][(x),(y)] = 25`

`x^2 + y^2 = 25`

and

`-2x^2 + y^2 = -2`

`x , y  ε  W` (whole number)

It can be observed that the above two equations are satified when x = 3 and  y= 4