Respuestas
Explicación paso a paso:
1- 3x – 2y + z = 12 3(3) – 2(−2) + (−1) = 12 9 + 4 – 1 = 12 13 – 1 = 12 12 = 12 2-. x + 3y + z = −4 3 + 3(−2) + (−1) = −4 3 + (−6) + (−1) = −4 −3 + (−1) = −4 −4 = −4 3- 2x + 2y – 4z = 6 2(3) + 2(−2) – 4(−1) = 6 6 + (−4) + 4 = 6 2 + 4 = 6 6 = 6. Espero q te sirva esto son 3 ejemplos solo elije 2.. :(