Let #a# and #b# be positive integers such that #ab + 1# divides #a^2 + b^2#. Show that #(a^2 + b^2) / (ab + 1)# is the square of an integer. ?
1 Answer
Sep 3, 2016
See below.
Explanation:
Supposing that
all the
The question follows. Are those all solutions?