Bob owns a watch repair shop. He has found that the cost of operating his shop is given by c(x)= 2x^2-16x+269 , where x is the number of watches repaired. What is his minimum cost?

Without using calculus, you can use to find the minimum cost.

a and b are the coefficients of your quadratic and c is the constant.

I need the answer to it

That's why I gave you an easy formula. Surely you can plug the values into the formula.

I got $237 :) Thanks

Yep, that's it. :)