1) AB= AC-BC
= 6x + 5 - ( 2x+3)
= 6x+5-2x+3
= 4x + 8
2) AC = 6x+5 = 6×2 +5= 12+5= 17
BC= 2x+3 = 2×2+3= 4+3= 7
AB=4x+8= 4×2+8 = 8×8= 64
