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.
Find out if you are duplicating the car maker's warranty. New cars will come with a warranty from the manufacturer that will typically cover you for the first three years, or around 36,000 miles.One of the factors to consider when thinking about an extended warranty is whether you plan to keep the car much beyond the period covered by the manufacturer. Generally you can purchase an extended warranty from the dealer, a warranty company or agent, an insurance company, a credit union, or a broker. 2  You can buy an extended warranty at any point after you have bought the car.