Prediksi PAS Ganjil Matematika Wajib Kelas 11 SMA se-Indonesia, Dilengkapi Jawaban Terbaru 2021

x - 6y = -10
x - 2y = 18
_________ -
-4y = -28
y = 7

x - 2y = 18
x = 18 + 2y
x = 18 + 2.7
x = 18 + 14
x = 32

jadi [ 32]
         7 

2. [2 6] M = [ 2 4]
      1 2          1 2

jika matrik M ordo 2 x 2 maka nilai matriks M =...

MA = B

M = 1/4 [ 2 -6] [2 4] = [-2+3 -4+6 ]
              -1 2     1 2       1+-1 2+-2

M = [-2+3 -4+6 ]
         1+-1 2+-2

M = [1 2]
        0 0

M = [-1 3  ] [2 4]
       1/2 -1   1 2