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Question Number 358 by 123456 last updated on 25/Jan/15

$$\mathrm{A}=\left[\begin{array}{cc}x& -y\\ y& x\end{array}\right]$$$$\mathrm{X}=\left[\begin{array}{c}x\\ y\end{array}\right]$$$$\mathrm{Y}=\mathrm{AX}$$

Answered by prakash jain last updated on 24/Dec/14

$$AX=\left[\begin{array}{c}{x}^2-y^2\\ 2xy\end{array}\right]$$

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