Identify binomial and formula: Identify the binomial to be squared and the special case formula to use.The given expression is (4z−4)2, which 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 binomial. Compare (4z−4)2 with (a−b)2. a=4zb=4
Apply binomial square formula: Apply the square of a binomial formula to expand (4z−4)2.(a−b)2=a2−2ab+b2(4z−4)2=(4z)2−2(4z)(4)+42
Simplify expanded expression: Simplify the expanded expression.(4z)2−2(4z)(4)+42= (4z⋅4z)−(2⋅4⋅4)z+4⋅4= 16z2−32z+16
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