Diketahui matrik A=(a+c. D-b) (4. -4) Dan B=(-4. C+5) (1. 4b) jika A=Bt nilai dari (a-b+c+2d) adalah.....

Matriks A =
| a+c d-b |
| 4 -4 |

Matriks B =
| -4 c+5 |
| 1 4b |

Matriks Bt =
|-4 1 |
| c+5 4b |

Jika, A = Bt, maka:
a+c = -4 ...(1)
d-b = 1 ...(2)
c+5 = 4 ...(3)
<=> c = 4-5 = -1
4b = -4 ...(4)
<=> b = -4/4 = -1

Subtitusi c = -1 ke (1)
a+(-1) = -4
a = -3
Subtitusi b = -1 ke (2)
d-(-1) = 1
d = 0

Maka, a+b+c+2d = (-3)+(-1)+(-1)+2(0) = -5.

Semoga membantu yaa ^_^