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.
Of those who purchased an extended warranty, 86 percent did so at the same time they bought their car. One of the reasons to do so is the convenience of rolling the cost into the car loan. That costs more money in the long run, however, because you have to pay interest on the warrantyâs fee.eace of mind comes at a price. If you opt for an extended warranty, consider these smart-buying tips. Donât buy under pressure. Dealers often try to sell the convenience of rolling coverage into a new-car loan, but that means you may be paying up front for coverage that you already have with the factory warranty.