matriks Q ialah . . . . (I yakni matriks identitas)
Jawaban:
PQ + I = (-7 -16)
( 4 9)
⇔ PQ = (-7 -16) _ I
( 4 9)
⇔ PQ = (-8 -16)
( 4 8)
⇔ P⁻¹PQ = P⁻¹(-8 -16)
( 4 8)
⇔ Q = (0 8)⁻¹ (-8 -16)
(7 3) ( 4 8)
⇔ Q = 1 (3 -8) (-8 -16)
0 – 56 (-7 0) ( 4 8)
⇔ Q = 1 (-24 – 32 -48 – 64)
-56 (56 + 0 112 + 0)
⇔ Q = (-56 -112)
( 56 112)
⇔ Q = (1 2)
(-1 -2)
Makara, matriks ( 1 2)
(-1 -2)