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দৃশ্যকাব্য-১: ( A = begin bmatrix 2 & 3 & -1 2 & 0 & 2 1 & -2 & 0 end bmatrix , f( alpha) = alpha^2 - 5 alpha. ) দৃশ্যকাব্য-২: ( beta = [3x + 2y + z quad x + 2y + 3z quad 2x + y + | Suva Ai