Diketahui
P = ⎧7 3⎫, Q = ⎧2 1⎫ dan PX = Q.
⎩9 4⎭ ⎩5 8⎭
Pembahasan:
PX = Q
X = P⁻¹Q
= 1 ⎧4 –3⎫⎧2 1⎫
74 – 39⎩–9 7⎭⎩5 8⎭
= 1 ⎧–7 –20⎫
1 ⎩17 47⎭
= ⎧–7 –20⎫
⎩17 47⎭