Normally a domestic freezer is best set to â18 Â°C (0 Â°F) or colder, as that's what the expiration dates for many food items are based on. It's also a requirement for freezers in restaurants, supermarkets & other places that sell food (at least here in Europe) to maintain a temperature of at most -18 Â°C.
Note: When you're dealing with quadratic equations, it can be really helpful to identify a, b, and c. These values are used to find the axis of symmetry, the discriminant, and even the roots using the quadratic formula. It's no question that it's important to know how to identify these values in a quadratic equation.
Your calculator should look like this: Solving Quadratic Equations using ZERO function The graphing calculator allows us to solve quadratic equations without factoring! In order to do this you must use the option called ZERO in the 2 nd TRACE Menu. EXAMPLE Solve: y= x 2 + 5x â 6 Y 1 = 3X-8.