2026 National Question 1 Single-choice Differentiating 2026_新课标 II Paper 1. $(1-3 \mathrm{i})^{2}=$ A. $-8+6 \mathrm{i}$B. -8-6iC. $8+6 \mathrm{i}$D. $8-6 \mathrm{i}$ Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →