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If A and B are two non-zero square matrices of same order such that (A + B)² = A² + B², then :
If A = [1 –2 0; 2 –1 –1; 0 –2 1], find A⁻¹ and use it to solve the following system of equations : x – 2y = 10, 2x – y – z = 8, – 2y + z = 7
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