Identify Special Case: Identify the special case that applies to the given expression (3m−1)2. This expression is in the form of (a−b)2. Special case: (a−b)2=a2−2ab+b2
Identify Values of a and b: Identify the values of a and b in the expression (3m−1)2. Compare (3m−1)2 with (a−b)2. a=3mb=1
Apply Binomial Formula: Apply the square of a binomial formula to expand (3m−1)2.(a−b)2=a2−2ab+b2(3m−1)2=(3m)2−2(3m)(1)+(1)2