Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X Articles in Press 2011 12 23 ON THE SPECTRA OF SOME MATRICES DERIVED FROM TWO QUADRATIC MATRICES en Tuğba Petik Department of Mathematics, University of Sakarya,TR54187, Sakarya, Turkey Halim Ozdemir Department of Mathematics, University of Sakarya, TR54187, Sakarya, Turkey 2011 07 06