Jawabanmu

2014-09-09T21:24:44+07:00
A*B =  \left[\begin{array}{ccc}2.1+ 3k&2.-2 + 4k\\1.1 + 0&1.-2+0.4\end{array}\right] 
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C =  \left[\begin{array}{ccc}2+3k&-4+4k\\1&-2\end{array}\right]
• -1 = 2 + 3K
3K = (-1)-2
3K = -3
K = -1