Persamaan Matriks
Jawab :
a + b = 4a - 5b
3a - 6b = 0
a - 2b = 0 ...(1)
2a - 15 = 6a + 7b
4a + 7b = -15 ...(2)
• eliminasi pers (1) dan (2)
(pers (1) dikali 4)
4a - 8b = 0
4a + 7b = -15
__________ -
-15b = 15
b = -1
• substitusi b = -1 ke pers (1)
a - 2b = 0
a - 2(-1) = 0
a = -2
_____________________________
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Persamaan Matriks
Jawab :
a + b = 4a - 5b
3a - 6b = 0
a - 2b = 0 ...(1)
2a - 15 = 6a + 7b
4a + 7b = -15 ...(2)
• eliminasi pers (1) dan (2)
(pers (1) dikali 4)
4a - 8b = 0
4a + 7b = -15
__________ -
-15b = 15
b = -1
• substitusi b = -1 ke pers (1)
a - 2b = 0
a - 2(-1) = 0
a = -2
_____________________________
Detil jawaban