Question

tolong bantu kerjakan ya kak​

Answer 1

[tex]\displaystyle\sf~ \begin{bmatrix} 0 & 7 \\ 4 & 5 \end{bmatrix}[/tex]

Penjelasan dengan langkah-langkah:

Diketahui:

matriks

[tex]\displaystyle\sf~ A = \begin{bmatrix} 3 & - 1 \\ 2 & 1 \end{bmatrix}[/tex]

[tex]\displaystyle\sf~ B = \begin{bmatrix} - 2 & 3 \\ 0 & 1 \end{bmatrix}[/tex]

Ditanya:

2A + 3B = ...?

Penyelesaian:

[tex]\begin{aligned} \displaystyle\sf~2A + 3B & = 2\displaystyle\sf~ \begin{bmatrix} 3 & - 1 \\ 2 & 1 \end{bmatrix} + 3\displaystyle\sf~ \begin{bmatrix} - 2 & 3 \\ 0 & 1 \end{bmatrix} \\ \\ &= \displaystyle\sf~ \begin{bmatrix} 6 & - 2 \\ 4 & 2 \end{bmatrix} + \displaystyle\sf~ \begin{bmatrix} - 6 & 9 \\ 0 & 3 \end{bmatrix} \\ \\ & = \displaystyle\sf~ \begin{bmatrix} 0 & 7 \\ 4 & 5 \end{bmatrix} \end{aligned}[/tex]