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34 lines
474 B
34 lines
474 B
\documentclass[border=10pt]{standalone}
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\usepackage{pgfplots}
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\pgfplotsset{width=10cm, compat=1.9}
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\begin{document}
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\begin{tikzpicture}
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\begin{axis}[
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%axis lines=both,
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xlabel=$x$,
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ylabel=$f(x)$
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]
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\addplot[
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color=red,
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domain=-10:10,
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samples=10,
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mark=*
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]{x^2-2*x-1};
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\addlegendentry{$x^2-2x-1$}
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\addplot[
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color=blue,
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domain=-10:10,
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samples=10,
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mark=square %pentagon%square
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]{x^2+2*x-1};
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\addlegendentry{$x^2+2x-1$}
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\end{axis}
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\end{tikzpicture}
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\end{document}
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