<prompt> Imepewa mathbfa anzapmatrix -7 0 1 mwishopmatrix na mathbfb anzapmatrix 4 2 -1 mwisho pmatrix, pata mathbfa - 3 mathbfb.  <response>: Tuna hiyomathbfa - 3 mathbfb anzapmatrix -7 0 1 mwishopmatrix - 3 anzapmatrix 4 2 -1 mwisho pmatrix anzapmatrix -19 -6 4 mwishopmmatrix. 