HELP!! I GIVE MEDALS
The cost to produce a product is modeled by the function f(x) = 5x2 - 70x + 258 where x is the number of products produced. Complete the square to determine the minimum cost of producing this product.

A.5(x - 7)2 + 13; The minimum cost to produce the product is $13.
B.5(x - 7)2 + 13; The minimum cost to produce the product is $7.
C.5(x - 7)2 + 258; The minimum cost to produce the product is $7.
D.5(x - 7)2 + 258; The minimum cost to produce the product is $258.

Question

HELP!! I GIVE MEDALS
The cost to produce a product is modeled by the function f(x) = 5x2 - 70x + 258 where x is the number of products produced. Complete the square to determine the minimum cost of producing this product. 
 	
A.5(x - 7)2 + 13; The minimum cost to produce the product is $13.
B.5(x - 7)2 + 13; The minimum cost to produce the product is $7.
C.5(x - 7)2 + 258; The minimum cost to produce the product is $7.
D.5(x - 7)2 + 258; The minimum cost to produce the product is $258.