To factor the expression \(4b - 4\), we need to find the greatest common factor (GCF) of the terms. The GCF of \(4b\) and \(-4\) is 4. We can factor out 4 from the expression.
Step 1: Identify the Expression
We start with the expression \(4b - 4\).
Step 2: Find the Greatest Common Factor
The greatest common factor (GCF) of the terms \(4b\) and \(-4\) is \(4\).
Step 3: Factor the Expression
We can factor out the GCF from the expression:
\[
4b - 4 = 4(b - 1)
\]
Final Answer
The factored form of the expression is \(\boxed{4(b - 1)}\).