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.
For example, many car manufacturers offer a three year or 36,000 mile new car warranty on most vehicles. However, if you buy a demo car that already has 4000 miles on the odometer, then the manufacturer's warranty will only be good for an additional 32,000 miles. This means that if your car begins to have problems after you drive it over the 36,000 mile mark, you'll need to pay for repairs or parts out of your own pocket.