September 2018 1 21 Report
Diketahui matriks:  \left[\begin{array}{ccc}2&1\\4&a\/\end{array}\right] ×  \left[\begin{array}{ccc}-2&a\\a+2b&1\\\end{array}\right] =  \ \left[\begin{array}{ccc}3&7\\13&15\\\end{array}\right]
tentukan nilai a dan b !!

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