i need this answer asap (as soon as possible) i spelled it so the ones who dont know what asap means:/

Complete the square to determine the minimum or maximum value of the function defined by the expression. x2 − 12x − 2 a) maximum value at 38 b) minimum value at 38 c) maximum value at −38 d) minimum value at −38

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Atemperature of 1.64◦f corresponds to answer in units of ◦c.