Finn factored the following polynomial, but Ms. Dufour says that he make a mistake in his work. State which step Finn made his first mistake. Show the correct work that should have been taken and complete the problem.

Problem: 24x2−56x+6x−14
Step 1: (24x2−56x)+(6x−14)
Step 2: 2x(12x−28)+2(3x−7)
Step 3: (3x−7)(8x+2)