<prompt> Bainisha wakati x4-1x2-1 imegawanywa na 1xx2.  <response>: Kwa kuwa x2 x 1 ni kigezo cha x2 x 1x - 1 x3 - 1, na hivyo pia xx3 - 1 x4 - x, salio wakati x4 - 1x2 - 1 imegawanywa na x2 x 1 ni sawa na salio lax - 1x2 - 1 x3 - x2 - x 1.Hii ina salio sawa wakati 1 - x2 - x 1 -x2 - x 2 -x2 x 1 3 imegawanywa na x2 x 1, ambayo ni 3. 