Not unless the dealer agrees to void the contract or fraud was involved. You signed it, and you will have to live with that decision.
after approved financing and signed contract, have had car 8 days, can a dealership take car back?
Depends on the car dealership in itself and where the lady signed the contract from
a realy domb question
You are obligated to the terms of the promissory note. You probably signed the contract stating that you had read and agreed to the terms of the contract.
Probably not if the contract you signed said "as is". Check your state lemon laws for buying vehicles.
A contract is a legally binding agreement between the parties who have signed it, unless written into the contract otherwise, all parties are bound by the terms of the agreement/contract they signed.
A car dealership can cancel a purchase if they haven't received the right amount of money to honor the contract. Otherwise, they can't cancel a contract that has already been signed.
It is wise to address such matters before the contract is signed. This is dictated by the terms of the contract the parties agreed on. If you've already signed the contract then you will just have to read the contract to find out.
Assuming you signed a contract, bought the car and there's no major defect, you can't return it to the dealership. There's no buyer's remorse law that applies to cars. It was assumed by the law that you, a reasonably intelligent adult, knowingly entered into a contract understanding its terms and conditions. Unless the car is a lemon, its yours.
Up to the point where the contract is signed, either party can modify the terms. Once the contract is signed, the deal is done and both sides have to live with it.