Page 138 - Math Grade 11 (Basic)

PROEUS DARA

3x + 7y = -6 3 7 6 7
n. tl=iQl2 D = = -34 , Dx = - = -170 ,
{ 4x-2y = 26 4-2 26 -2

D
_ Dx _ -170 _
102
D = 3 6 = 102 X------5 y = _l' =- = -3
-
y 4 26 D -34 D -34

4x-5y = 13 4 5
2. tl=iQl2 D = - = 0 13 -5 = 170 "'0
{ - 8x+ lOy = 8 -8 10 8 10

D = 4 13 = 32 + 104 = 136 "'0
y
-8 8

""
<I
""
L:Hi t 2 g 1'i.Hl2 n5'i:HflHfl 2 tH'tH1J
u LJ cs3 ..-f) 6\J
- "" 4 -5 13
t R n1 t ~ 61 till QJ m _ = ,.,
8 1 0 18
x+2y+3z = 2 1 2 3
j
R. - 2x + y + 2z = 1 tl=iQlS D = -2 1 2 = 12 ,
4x- y = 3 4 -1 0

2 2 3 2 3 1 2 2
Dx = 1 1 2 = 4 , Dy = -2 1 2 = -20 ' Dz = -2 1 1 = 20
3 -1 0 4 3 0 4 -1 3

4 1 -20 5 20 5 "" ,
<I
""
X=-=- y =- = - z = - = - dltH'i:HiH2'i'i.Hl2 hl'tH1U
12 3 12 3 ' 12 3 6\J l_j cJ
2x + 2 y + 2z = 0 2 2 2 0 2 2
j
ill. - 2x + 5 y + 2z = 1 tl=iQl2 D = -2 5 2 = 0 , Dx = 1 52 = 0
8x + y + 4z = -1 8 1 4 -1 1 4

2x+2y+2z = 0
+ 1 + 3!
-2x+5y+2z = 1 , x=---
7
7y +Az = 1
\
1 31 , y = ~ 41
1
~m2gfH~f1HltH~2HnH2Lun~w-thm?t x == ; , z = z

135