ax+by=1................(i)
bx+ay=2ab/a² + b² .......................(ii)
ax+by=1 .................. *a
a²x + aby = a ....................(iii)
bx+ay=2ab/(a² + b²).......................* b
b ² x +aby = 2ab² /(a² + b²)..........(iv)
subtracting eq (iv) from (iii)
