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{-4 23} {2p -5p} {0 q}
2= -p + 0 7=3p+ q
2= -p 7= -6 + q
p=-2 q= 13
5. { a b} { 6 -5 } = {12 -7}
{3 -2} {2 4} { 14 -23}
{6a+2b -5a+4b } = {12 -7}
{14 -23 } { 14 -23}
6a +2b=12 x2
-5a+4b= -7 x1
-------------------
12a + 4b= 24
-5a + 4b= -7
------------------- -
17a= 31
a= 31/17
6a+ 2b=12
6a+ 2b= 12
6.31/7+2b=12
186 /17 +2b= 12
2b= 12- 186/17
2b= (204-186)/17
2b= 18/17
b= 18/17/ 2
b= 18/34
16. 4x-12=0
4x= 12
x= 3
2y + 4= 5
2y= 1
y= 1/2
6. 44-6x= 44
-6x= 44-44
x= 0
no. 2
kalikan p dan q terlebih dulu ke masing" nilai yang ada dalam tanda kurung ()
sehingga,
-4 = 2p +0
-4 = 2p
p = -2
7 = 3p + q
7 = 3(-2) + q
7 = -6 + q
q = 13
jadi, p = -2 dan q = 13
No. 5
kalikan matriks sebelah kiri
sehingga hasilnya nanti adalah
| 6a + 2b -5a + 4b | = | 12 -27 |
| 14 -23 | | 14 -23 |
6a + 2b = 12 |x2
-5a + 4b = -27 |x1
sehingga,
12a + 4b = 24
-5a + 4b = -27 -
17 a = 51
a = 3
6a + 2b = 12
6(3) + 2b = 12
18 + 2b =12
2b = -6
b = -3
jadi, a= 3 dan b = -3
No. 16
kalikan matriks sebelah kiri
sehingga hasilnya
| 4x-12 -x-y+9 | = | 0 2 |
| -16 10-57 | | -16 5 |
4x-12 = 0
4x =12
x =3
-x-y+9 = 2
-3-y+9 =2
-y+6 = 2
y = 4
jadi, x = 3 , dan y = 4
n0. 6
kalikan matriks sebelah kiri juga yang ada di kanan
hasilnya seperti ini:
| -11x-2 44-6x | = | -2 44 |
| -40 12 | | -40 28 |
44-6x = 44
-6x = 0
x = 0