You didn't bother to list the binomials to choose from, but the two binomial factors of
x2 + 6x - 40
are (x + 10) and (x - 4)
$400-$500 New
This is a very simple explanation. A database is a collection of schemas. A schema is a collection of tables. A table is a collection of possibly unlimited rows organized into fields or more commonly called columns. Think of a spread sheet. For example an inventory table might have columns ITEM_NUMBER, ITEM_NAME, and ITEM_QUANTITY. ITEM_NUMBER is defined to store only whole numbers ITEM_NAME is defined to store only letters and numbers up to the length of 20 ITEM_QUANTITY is defined to store only whole numbers Here is some possible sample data ITEM_NUMBER * ITEM_NAME * ITEM_QUANTITY 1001 * Washer Brass * 5044 1002 * Screw 4x40 stainless * 5027 1003 * Screw 6x40 stainless * 4947 So, to answer your question, a database column (or field) belongs to a table and has attributes that describe the column and what can be stored in the column.