A^2-2A + I
= [1 0] - [2 0] + [1 0]
8 9 4 6 0 1
= [0 0]
4 4
Baca Juga: Soal dan Kunci Jawaban PTS Ganjil Matematika Wajib Kelas 11 SMA, Bagian 1
12. Matriks A = [4 2] B = [-x -1] C =[10 7]
x 1 3 y -9 2
Jika 3A - B = C maka x + y =...
pembahasan :
[12 6] - [-x -1] = [10 7]
3x 3 3 y -9 2
12 - (-x) = 10
x = 10-12
x = -2