Mau tanya jawaban saya benar atau salah?
![\left[\begin{array}{cc}5&2\\7&3\end{array}\right] A= \left[\begin{array}{cc}3&6\\4&8\end{array}\right]\\\\Matriks\ A\ adalah\\\\Jawaban\ :\\\\ \left[\begin{array}{cc}1&4\\-1&-7\end{array}\right]](https://tex.z-dn.net/?f=+%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D5%262%5C%5C7%263%5Cend%7Barray%7D%5Cright%5D+A%3D+%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D3%266%5C%5C4%268%5Cend%7Barray%7D%5Cright%5D%5C%5C%5C%5CMatriks%5C+A%5C+adalah%5C%5C%5C%5CJawaban%5C+%3A%5C%5C%5C%5C+%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D1%264%5C%5C-1%26-7%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{cc}5&2\\7&3\end{array}\right] A= \left[\begin{array}{cc}3&6\\4&8\end{array}\right]\\\\Matriks\ A\ adalah\\\\Jawaban\ :\\\\ \left[\begin{array}{cc}1&4\\-1&-7\end{array}\right]")
Kilos
![\left[\begin{array}{cc}5&2\\7&3\end{array}\right] \left[\begin{array}{cc}a&b\\c&d\end{array}\right] = \left[\begin{array}{cc}3&6\\4&8\end{array}\right] \\\\ 5a + 2c = 3 \\ 5b + 2d = 6 \\ 7a + 3c = 4 \\ 7b + 3d = 8 \\\\ ========== \\\\ 5a + 2c = 3 \\ 15a + 6c = 9 \\\\ 7a + 3c = 4 \\ 14a + 6c = 8 \\\\ 15a + 6c = 9 \\ \underline {14a + 6c = 8} ~- \\ a = 1 \\\\ ========== \\\\ 5a + 2c = 3 \\ 2c = 3 - 5a \\ 2c = 3 - 5(1) \\ 2c = 3 - 5 \\ 2c = -2 \\ c = -1 \\\\ ==========](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D5%262%5C%5C7%263%5Cend%7Barray%7D%5Cright%5D+++%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7Da%26b%5C%5Cc%26d%5Cend%7Barray%7D%5Cright%5D+%3D+++%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D3%266%5C%5C4%268%5Cend%7Barray%7D%5Cright%5D+%5C%5C%5C%5C+5a+%2B+2c+%3D+3+%5C%5C+5b+%2B+2d+%3D+6+%5C%5C+7a+%2B+3c+%3D+4+%5C%5C+7b+%2B+3d+%3D+8+%5C%5C%5C%5C+%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D+%5C%5C%5C%5C+5a+%2B+2c+%3D+3+%5C%5C+15a+%2B+6c+%3D+9+%5C%5C%5C%5C+7a+%2B+3c+%3D+4+%5C%5C+14a+%2B+6c+%3D+8+%5C%5C%5C%5C+15a+%2B+6c+%3D+9+%5C%5C+%5Cunderline+%7B14a+%2B+6c+%3D+8%7D+%7E-+%5C%5C+a+%3D+1+%5C%5C%5C%5C+%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D+%5C%5C%5C%5C+5a+%2B+2c+%3D+3+%5C%5C+2c+%3D+3+-+5a+%5C%5C+2c+%3D+3+-+5%281%29+%5C%5C+2c+%3D+3+-+5+%5C%5C+2c+%3D+-2+%5C%5C+c+%3D+-1+%5C%5C%5C%5C+%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D "\left[\begin{array}{cc}5&2\\7&3\end{array}\right] \left[\begin{array}{cc}a&b\\c&d\end{array}\right] = \left[\begin{array}{cc}3&6\\4&8\end{array}\right] \\\\ 5a + 2c = 3 \\ 5b + 2d = 6 \\ 7a + 3c = 4 \\ 7b + 3d = 8 \\\\ ========== \\\\ 5a + 2c = 3 \\ 15a + 6c = 9 \\\\ 7a + 3c = 4 \\ 14a + 6c = 8 \\\\ 15a + 6c = 9 \\ \underline {14a + 6c = 8} ~- \\ a = 1 \\\\ ========== \\\\ 5a + 2c = 3 \\ 2c = 3 - 5a \\ 2c = 3 - 5(1) \\ 2c = 3 - 5 \\ 2c = -2 \\ c = -1 \\\\ ==========")
![5b + 2d = 6 \\ 15b + 6d = 18 \\\\ 7b + 3d = 8 \\ 14b + 6d = 16 \\\\ 15b + 6d = 18 \\ \underline {14b + 6d = 16} ~- \\ b = 2 \\\\ ========== \\\\ 5b + 2d = 6 \\\\ 2d = 6 - 5b \\\\ 2d = 6 - 5(2) \\\\ 2d = 6 - 10 \\\\ 2d = -4 \\\\ d = -2 \\\\ ========== \\\\ maka A = \left[\begin{array}{cc}1&2\\-1&-2\end{array}\right]](https://tex.z-dn.net/?f=5b+%2B+2d+%3D+6+%5C%5C+15b+%2B+6d+%3D+18+%5C%5C%5C%5C+7b+%2B+3d+%3D+8+%5C%5C+14b+%2B+6d+%3D+16+%5C%5C%5C%5C+15b+%2B+6d+%3D+18+%5C%5C+%5Cunderline+%7B14b+%2B+6d+%3D+16%7D+%7E-+%5C%5C+b+%3D+2+%5C%5C%5C%5C+%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D+%5C%5C%5C%5C+5b+%2B+2d+%3D+6+%5C%5C%5C%5C+2d+%3D+6+-+5b+%5C%5C%5C%5C+2d+%3D+6+-+5%282%29+%5C%5C%5C%5C+2d+%3D+6+-+10+%5C%5C%5C%5C+2d+%3D+-4+%5C%5C%5C%5C+d+%3D+-2+%5C%5C%5C%5C+%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D+%5C%5C%5C%5C+maka+A+%3D+++%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D1%262%5C%5C-1%26-2%5Cend%7Barray%7D%5Cright%5D+ "5b + 2d = 6 \\ 15b + 6d = 18 \\\\ 7b + 3d = 8 \\ 14b + 6d = 16 \\\\ 15b + 6d = 18 \\ \underline {14b + 6d = 16} ~- \\ b = 2 \\\\ ========== \\\\ 5b + 2d = 6 \\\\ 2d = 6 - 5b \\\\ 2d = 6 - 5(2) \\\\ 2d = 6 - 10 \\\\ 2d = -4 \\\\ d = -2 \\\\ ========== \\\\ maka A = \left[\begin{array}{cc}1&2\\-1&-2\end{array}\right]")
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