Which of the following is equivalent to 0 equals 2 x squared minus 16 x minus 18 when completing the square? a.) open parentheses x minus 4 close parentheses squared equals 34 b.) open parentheses x minus 8 close parentheses squared equals 25 c.) open parentheses x minus 4 close parentheses squared equals 25 d.) open parentheses x minus 8 close parentheses squared equals 34