soal 1) tentukanlah himpunan penyelesaian dari SPLTV berikut: 2x + 3y - 4z = -4 2x - 4y + 3z = -17 -3x + 2y + 4z = -9 soal 2 Tentukanlah akar–akar(x¹ dan x²) da

[tex]1.2x + 3y - 4z = - 4 \\ 2x - 4y + 3z = - 17 \\ - 3x + 2y + 4z = - 9 \\ determinan = - 63 \\ determinan \: x = 315 \\ determinan \: y = 126 \\ determinan \: z = 315 \\ mencari \: nilai \: x \: y \: dan \: z \\ x = \frac{315}{ - 63} = - 5 \\ y = \frac{126}{ - 63} = - 2 \\ z = \frac{315}{ - 63} = - 5 \\ [/tex]
[tex]2.(1) \\ x {}^{2} + 11x + 18 = 0 \\ x { }^{2} + 9x + 2x + 18 = 0 \\ x(x + 9) + 2(x - 9) = 0 \\ (x + 2)(x + 9) = 0 \\ x = - 2 \\ x = - 9[/tex]
[tex]2.(2) \\ 2 {x}^{2} + 17x - 9 = 0 \\ 2 {x}^{2} + 18x - x - 9 = 0 \\ 2x(x + 9) - (x + 9) = 0 \\ (2x - 1)(x + 9) = 0 \\ x = - 9 \\ x = \frac{1}{2} [/tex]
[tex]3.(1) \\ {x}^{2} - 7x - 18 = 0 \\ (x - 9)(x + 2) = 0 \\ x = - 2 \\ x = 9[/tex]
[tex]3.(2) \\ 2 {x}^{2} - 19x - + 9 = 0 \\ (x - 9)(2x - 1) = 0 \\ x = \frac{1}{2} \\ x = 9 [/tex]
Semoga membantu :)