\documentclass[a4paper,11pt]{article}
\usepackage[polish]{babel}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{fourier}
\usepackage{graphicx}



\begin{document}

\includegraphics[trim=1cm 1cm 0 0, clip, scale=0.65]{demo.pdf}\quad
\includegraphics[bb=1cm 1cm 5cm 5cm, clip]{demo.pdf}

\end{document}