Polynomial roots calculator

Find the roots of a polynomial c1 + c2x + ... + cnxn-1. Enter c1 ... cn as the c sequence. The result is a sequence of complex roots.
sequence c:
 Upload Excel or CSV file for batch operation: (read about supported files and formats)
  API URL: http://calculator.vhex.net/c/polyroots (see documentation. JSONP is now available)