title: Can't install Laravel Telescope in ubuntu 18
body: <p>I am creating a new project in Laravel 5.8 and I also want to install Telescope, but when I execute the command in my project:</p>
  
  <pre><code>composer require laravel/telescope
  </code></pre>
  
  <p>output:</p>
  
  <pre><code>./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages.
  
    Problem 1
      - laravel/telescope 2.0.x-dev requires moontoast/math ^1.1 -&gt; satisfiable by moontoast/math[1.1.0, 1.1.1, 1.1.2].
      - laravel/telescope v2.0 requires moontoast/math ^1.1 -&gt; satisfiable by moontoast/math[1.1.0, 1.1.1, 1.1.2].
      - laravel/telescope v2.0.1 requires moontoast/math ^1.1 -&gt; satisfiable by moontoast/math[1.1.0, 1.1.1, 1.1.2].
      - laravel/telescope v2.0.2 requires moontoast/math ^1.1 -&gt; satisfiable by moontoast/math[1.1.0, 1.1.1, 1.1.2].
      - laravel/telescope v2.0.3 requires moontoast/math ^1.1 -&gt; satisfiable by moontoast/math[1.1.0, 1.1.1, 1.1.2].
      - laravel/telescope v2.0.4 requires moontoast/math ^1.1 -&gt; satisfiable by moontoast/math[1.1.0, 1.1.1, 1.1.2].
      - moontoast/math 1.1.2 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - moontoast/math 1.1.1 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - moontoast/math 1.1.0 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - Installation request for laravel/telescope ^2.0 -&gt; satisfiable by laravel/telescope[2.0.x-dev, v2.0, v2.0.1, v2.0.2, v2.0.3, v2.0.4].
  
    To enable extensions, verify that they are enabled in your .ini files:
      - /etc/php/7.2/cli/php.ini
      - /etc/php/7.2/cli/conf.d/10-mysqlnd.ini
      - /etc/php/7.2/cli/conf.d/10-opcache.ini
      - /etc/php/7.2/cli/conf.d/10-pdo.ini
      - /etc/php/7.2/cli/conf.d/15-xml.ini
      - /etc/php/7.2/cli/conf.d/20-calendar.ini
      - /etc/php/7.2/cli/conf.d/20-ctype.ini
      - /etc/php/7.2/cli/conf.d/20-dom.ini
      - /etc/php/7.2/cli/conf.d/20-exif.ini
      - /etc/php/7.2/cli/conf.d/20-fileinfo.ini
      - /etc/php/7.2/cli/conf.d/20-ftp.ini
      - /etc/php/7.2/cli/conf.d/20-gd.ini
      - /etc/php/7.2/cli/conf.d/20-gettext.ini
      - /etc/php/7.2/cli/conf.d/20-iconv.ini
      - /etc/php/7.2/cli/conf.d/20-json.ini
      - /etc/php/7.2/cli/conf.d/20-mbstring.ini
      - /etc/php/7.2/cli/conf.d/20-mysqli.ini
      - /etc/php/7.2/cli/conf.d/20-pdo_mysql.ini
      - /etc/php/7.2/cli/conf.d/20-phar.ini
      - /etc/php/7.2/cli/conf.d/20-posix.ini
      - /etc/php/7.2/cli/conf.d/20-readline.ini
      - /etc/php/7.2/cli/conf.d/20-shmop.ini
      - /etc/php/7.2/cli/conf.d/20-simplexml.ini
      - /etc/php/7.2/cli/conf.d/20-sockets.ini
      - /etc/php/7.2/cli/conf.d/20-sysvmsg.ini
      - /etc/php/7.2/cli/conf.d/20-sysvsem.ini
      - /etc/php/7.2/cli/conf.d/20-sysvshm.ini
      - /etc/php/7.2/cli/conf.d/20-tokenizer.ini
      - /etc/php/7.2/cli/conf.d/20-wddx.ini
      - /etc/php/7.2/cli/conf.d/20-xmlreader.ini
      - /etc/php/7.2/cli/conf.d/20-xmlwriter.ini
      - /etc/php/7.2/cli/conf.d/20-xsl.ini
      - /etc/php/7.2/cli/conf.d/20-zip.ini   You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
  
  Installation failed, reverting ./composer.json to its original content.
  </code></pre>
  
  <p>How can I install the missing dependencies? I'm working on PHP 7.2 and ubuntu 18.04.2. </p>