What is the sum of all possible values of k for which x^2 + kx - 10x + 36 is the square of a binomial?
(x+6)^2 = x^2 + 12x + 36 means k = 22
(x-6)^2 = x^2 -12x + 36 means k = -2 Add 'em together........
+37157 
