EASY QUESTION** Just give me any equation with two turning points and intercepts the x axis three times

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

Solve the equation by completing the square. x^2+2x=17

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11