diketahui matriks a = [a   2]  b = [-1  2] c =  [4  d] [b  -4]         [c  -2]       [9 -2] serta a x b = c . Nilai 2a + b - 3c adlh *dgn penyelesa

semoga bisa membantu yaa

[tex]a \times b = c \\ \binom{a \: \: \: \: \: 2}{b \: - 4} \binom{ - 1 \: \: \: 2}{c \: \: - 2} = \binom{4 \: \: \: \: \: d}{9 \: - 2} \\ \binom{ - a + 2c \: \: \: 2a - 4}{ - b - 4c \: \: \: \: \: \: \: 2b + 8} = \binom{4 \: \: \: d}{9 \: - 2} \\ 2b + 8 = - 2 \\ 2b = - 10 \\ b = - 5 \\ \\ - b - 4c = 9 \\ 5 - 4c = 9 \\ - 4c = 4 \\ c = - 1 \\ \\ - a + 2c = 4 \\ - a - 2 = 4 \\ a = - 2 \\ \\ 2a + b - 3c = - 4 - 5 + 3 = - 6[/tex]