Which are the solutions of the quadratic equation?
x² = -5x-3
-5,0
-5 - 13 -5 + 13
2
2
5 - 13 5 + 13
2
2
0 5,0

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )