<prompt> Acha z_1 na z_2 ziwe mizizi changamano ya z2 az b 0, ambapo a na b ni nambari changamano. Katika ndege changamano, 0, z_1, na z_2 huunda wima za pembetatu iliyo sawa. Tafuta fraca2b.  <response>: Hebu z_2 omega z_1, ambapo omega epi i3. Kisha kwa fomula za Vieta,anzaalign-a z_1 z_2 1 omega z_1, b z_1 z_2 omega z_12.mwishoalignKwa hiyo,anzaalignfraca2b frac1 omega2 z_12omega z_12 fracomega2 2 omega 1omega omega 2 frac1omega epi i3 2 e-pi i3 frac12 i fracsqrt32 2 frac12 - i fracsqrt32 3.mwishopanga 