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Recursionmedium
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Two sequences are coupled by the system: xn=3xn−1−2yn−1x_n = 3x_{n-1} - 2y_{n-1}xn​=3xn−1​−2yn−1​ and yn=2xn−1−2yn−1y_n = 2x_{n-1} - 2y_{n-1}yn​=2xn−1​−2yn−1​ with x0=1,y0=1x_0 = 1, y_0 = 1x0​=1,y0​=1. Compute x2+y2x_2 + y_2x2​+y2​.