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Un sistema de ecuaciones se puede expresar en forma matricial: El sistema de la forma a11 x + a12 y + a13 z = b1 a21 x + a22 y + a23 z = b2 a31 x + a32 y + a33 z = b3 se puede expresar utilizando matrices del siguiente modo: a11 a12 a13 b1 a21 a22 a23 b2 a31 a32 a33 b3 a11 a12 a13 donde A = a21 a22 a23 a31 a32 a33 a11 a12 a13 b1 y B = a21 a22 a23 b2 a31 a32 a33 b3
es la matriz de los coeficientes es la matriz ampliada