Solve the quadratic function using complete the square. explain and show steps. i don't get it.

Plz me i need i will give a brain

Pls brainliest will be awarded if answer is correct

The manager at gabriela's furniture store is trying to figure out how much to charge for a book shelf that just arrived. the book shelf was bought at a wholesale price of $ 1 4 7 . 0 0 $147.00, and gabriela's furniture store marks up all furniture by 6 0 % 60%. at what price should the manager sell the book shelf?