Which shows one way to determine the factors of x12x2-2x + 24 by grouping? O x(X2-12) + 2(*2-12)
O xoe- 12) -2(2– 12)
O x- 12) + 2(x- 12)
O x- 12) - 2(x - 12)

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6