0606 P22 - Nov 2017 - Q8 - 7 marks
8668
The matrix \(A\) is \(\begin{pmatrix}2&1\\4&3\end{pmatrix}\).
(i) Find \((2A)^{-1}\).
(ii) Hence solve the simultaneous equations
\(2y+4x+5=0,\)
\(6y+8x+9=0.\)
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