[a2baabb2]\begin{bmatrix}{a²}&{ba}\\{ab}&{b²}\end{bmatrix}[a2abbab2] Persamaan linear: a²= ba ab = b² a²-ba =0 ab - b² =0 a²-ab-ba+ b² = 0 a²-2ab+ b² = 0 Benar ini kak