<prompt> Acha a na b ziwe nambari changamano zisizo za kawaida kiasi kwamba a2 ab b2 0. Tathminifraca9 b9a b9.  <response>: Kwa kuwa a2 ab b2 0, a - ba2 ab b2 0. Hii hurahisisha hadi a3 - b3 0, hivyo a3 b3.Kisha b9 a9. Pia,a b2 a2 2ab b2 a2 ab b2 ab ab,hivyoa b3 aba b aab b2 a-a2 -a3.Kisha a b9 -a33 -a9, hivyofraca9 b9a b9 frac2a9-a9 -2. 