![\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right]](/tpl/images/0519/1481/8e5bd.png)
, then![\left[\begin{array}{ccc}5&1\\a+1&a\\\end{array}\right]](/tpl/images/0519/1481/ccd86.png)
![\left[\begin{array}{ccc}5&1\\3&2\\\end{array}\right]](/tpl/images/0519/1481/34b64.png)
![\left[\begin{array}{ccc}5(5)+1(3)&5(1)+1(2)\\3(5)+2(3)&3(1)+2(2)\\\end{array}\right]](/tpl/images/0519/1481/50f50.png)
= ![\left[\begin{array}{ccc}28&7\\21&7\\\end{array}\right]](/tpl/images/0519/1481/f77cb.png)
![\left[\begin{array}{ccc}7(5)&7(1)\\7(3)&7(2)\\\end{array}\right]](/tpl/images/0519/1481/3d6c7.png)
= ![\left[\begin{array}{ccc}35&7\\21&14\\\end{array}\right]](/tpl/images/0519/1481/0fd7c.png)
![\left[\begin{array}{ccc}1&0\\0&1\\\end{array}\right]](/tpl/images/0519/1481/031e3.png)
= ![\left[\begin{array}{ccc}7&0\\0&7\\\end{array}\right]](/tpl/images/0519/1481/2d3fa.png)
![\left[\begin{array}{ccc}(28-35+7)&(7-7+0)\\(21-21+0)&(7-14+7)\\\end{array}\right]](/tpl/images/0519/1481/025ae.png)
= ![\left[\begin{array}{ccc}0&0\\0&0\\\end{array}\right]](/tpl/images/0519/1481/a4379.png)
Please help me. How can I solve this?
...
Answers: 1
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