<prompt> Tafuta makadirio ya vekta anzapmatrix 1 -2 endpmatrix kwenye vekta beginpmatrix 8 1 endpmatrix.  <response>: Kutoka kwa fomula ya makadirio,jina la operetaproj_anzapmatrix 8 1 mwishopmatrix anzapmatrix 1 -2 mwishopmatrix fracanzapmatrix 1 -2 mwishopmatrix cdot anzapmatrix 8 1 mwishopmmatrixleft anzapmatrix 8 1 mwishopmatrix kulia2 anzapmatrix 8 1 mwishopmatrix frac665 anzapmatrix 8 1 mwishopmatrix anzapmatrix 4865 665 mwishopmatrix. 