Special Case Identification: z - \(1)^2(\newline\)Which special case applies here?z - \(1)^2\ is in the form of a - b)^\(2\.Special case: a - b)^\(2 = a^2 - 2ab + b^2\
Identify a and b:(z−1)2Identify the values of a and b.Compare (z−1)2 with (a−b)2.a=zb=1
Apply Binomial Square: We found:a=zb=1Apply square of a binomial to expand (z−1)2.(a−b)2=a2−2ab+b2(z−1)2=z2−2(z)(1)+12