I am studying for the GRE and reviewing math I haven't seen in years. I've got the answer and have solved similar problems, but am having trouble understanding a specific step in the factoring. I realize asking you folks is a lot like using an AT4 to shoot an ant, but I would appreciate the assistance if you could help.
The problem is Solve 3x^2+11x−4=0
The solution to the factoring process shows the following 3 steps: Step 1: =3x^2+12x−x−4 Step 2: =3x(x+4)−1(x+4) Step 3: =(3x−1)(x+4)
I can figure out everything through step 2 and after step 3, but I can't figure out how they factored step 2 into step 3.
Thanks for the help.