The discriminant tells us there are two roots when positive, one root when zero, and no roots when negative. b^2-4ac = (-8)^2-4*3*1 = 52 is positive, so there are two roots. The discriminant is just part of the quadratic equation. The quadratic equation gives us the exact real number roots of any equation in the form ax^2+bx+c=0. The quadratic equation is x = (-b \pm sqrt(b^2-4ac))/(2a), where \pm means that we have two values, one using + (addition) and one using - (subtraction). Let D = b^2-4ac.
A data warehouse is a special type of database used for analysis of data. A general database is usually used for transaction processing, and hence, it is not optimized for analysis and reporting. But a data warehouse is specially designed and optimized for analysis tasks.
Companies often store goods in a warehouse. A warehouse is a building where goods are stored. Warehouse inventory is cataloged so the company knows what is in stock. Some warehouses' inventory control may be completely automated, while others keep physical records.View slideshow of images above. warehouse is a building where goods are stored. Warehouse inventory is cataloged so the company knows what is in stock. Some warehouses' inventory control may be completely automated, while others keep physical records. View slideshow of images above.