In the case of a 2 Ã 2 matrix, the specific formula for the determinant is simply the upper left element times the lower right element, minus the product of the other two elements.
Before you buy any extended warranty... An extended warranty should not be a rush purchase! Before buying any extended warranty, read the contract carefully. Be sure you understand what is and what is not covered, where you can have your car repaired, and whether there are any deductibles or limits on your coverage.emember, you do not need to purchase your extended warranty from the dealership. If your dealer tells you that you cannot obtain financing without buying an extended warranty or that you can only buy an extended warranty when you purchase the car, it's time to find a new dealer.
Extra coverage that covers major repairs that occur after the manufacturerâs warranty expires. Itâs your call whether you need it. Donât feel pressured to buy such a warranty at the same time you buy the car; you can usually buy a plan anytime before the original warranty expires. If you do buy, we suggest sticking with a plan offered by the automaker. Third-party coverage may be cheaper, but can vary enormously in quality and coverage.