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.
As with most products and services offered in the F&I office, an extended warranty doesn't have to be purchased when you buy the car. In fact, you can usually buy a warranty any time before the car's manufacturer warranty expires. Moreover, you don't have to buy it from the dealership where you purchased the car.The only advantage to buying it as part of a new-car purchase is that you can roll it into the financing and monthly payments.This means you will wind up paying more for it over the long haul, but you don't have to pay one lump sum.n extended warranty is really a service contract. It covers the cost of specified repairs after the car's manufacturer warranty expires. Think of it as medical insurance for your car. Some extended warranties are more comprehensive than others. Some have deductibles, while others don't.