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.
Rather than invest in an extended warranty, we recommend buying the most reliable car that suits your needs, budget, and taste. . . and then taking good care of it. Sometimes, this can mean spending more upfront for the right car, but the reward is typically lower ownership costs and even better resale value.fter dedicating an afternoon (or more) to test driving, negotiating, and completing a pile of paperwork for your shiny new car, don't be surprised if a bubble-bursting finance manager at the dealer gives a compelling pitch for an extended warranty. It is for your peace of mind, right? Well, not really.