在LaTeX中插入图像的间距问题

Question

\documentclass[12pt,openany]{book}
\usepackage{amsmath,polynom,amssymb,venndiagram,mathtools,graphicx,fancyhdr,wrapfig}
\usepackage[rightcaption]{sidecap}
\graphicspath{ {./spm/} }
\usepackage[margin=3cm]{geometry}
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\begin{enumerate}

    \setcounter{equation}{0}
    \item [(a)] 
    \begin{align}
    y-x&=7 \\
    y-x^2&=1
    \end{align}
    (1)-(2):
    \begin{align*}
    x^2-x-6&=0 \\
    (x-3)(x+2)&=0 \\
    x=3 \  \  \text{or} \ \  x=-2
        \end{align*}

    Substituting    $x=3$ and $x=-2$ into (1) , we get $y=10$ and $y=5$ respectively.
    $\therefore$ The points of intersection between the lines $y-x=7$ and $y-x^2=1$ are \\ \ (3 , 10) and (-2 , 5).
    \item[(b)]

\includegraphics[width=\textwidth]{geogebra-export}
    \item[(c)] 
    The height that the crossbar in Figure A must be raised 5 feet higher to achieve the position in Figure B. The coordinates of the ends of the rope are (-3,10) and (3,10).

\end{enumerate}
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行与行之间的间距异常大......在我插入图片之前不是这样的，请问问题出在哪里？