images from static files in django code example

Example 1: my django template doesnt want to load the static file

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, "/static/")

STATICFILES_DIRS = ( 
    STATIC_ROOT,        
)

Example 2: css django

{% load static %}

<link rel="stylesheet" type="text/css" href="{% static 'polls/style.css' %}">