Identify values of a and b: Identify the values of a and b. In the expression (3b−2)2, a is 3b and b is 2.
Apply binomial square formula: Apply the square of a binomial formula to expand (3b−2)2. Using the identity (a−b)2=a2−2ab+b2, we get: (3b−2)2=(3b)2−2⋅(3b)⋅2+(2)2
Simplify terms in expansion: Simplify each term in the expansion.(3b)2=9b2 (since 3b×3b=9b2)−2×(3b)×2=−12b (since −2×3b×2=−12b)(2)2=4 (since 2×2=4)
Combine simplified terms: Combine the simplified terms to get the final answer.(3b−2)2=9b2−12b+4
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