Use the expression below. –4b + 8c + 12 – 8b – 2c + 6 part a simplify the expression. enter your answers in the boxes. b + c + part b factor the simplified expression using the gcf. a. 2(–2b + c + 3) b. 3(–2b + c + 3) c. 4(–2b + c + 3) d. 6(–2b + c + 3) part c what is the value of the expression when b = 2 and c = –3? enter your answer in the box.