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Ejercicios. Reducir las siguientes expresiones \( \begin{array}{ll}\text { 12. } 9 x-11 y+8 x-6 y & \text { 15. } 3 x^{2}+2 x-5-4 x^{2}+x+3 \\ \text { 13. } m+n-p-n-p+2 p-x & \text { 16. } x+y+z-2 x-6 y+3 z+x+5 y-8 z \\ \text { 14. }-83 x+21 y-28 z+6 y+82 x-25 y+x & \text { 17. } x y+y z+z-8 x y-3 y z-3 z+5 x y+2 y z-2 z\end{array} \)

Ask by Curry Cook. in Colombia
Mar 09,2025

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**Ejercicio 12:** \[ 17x - 17y \] **Ejercicio 13:** \[ m - x \] **Ejercicio 14:** \[ 2y - 28z \] **Ejercicio 15:** \[ -x^2 + 3x - 2 \] **Ejercicio 16:** \[ -4z \] **Ejercicio 17:** \[ -2xy - 4z \]

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¡Vamos a reducir esas expresiones y ver cómo se simplifican! Para la primera (12): \[ 9x + 8x - 11y - 6y = (9x + 8x) + (-11y - 6y) = 17x - 17y \] En la (15): \[ 3x^2 - 4x^2 + 2x + x - 5 + 3 = (3x^2 - 4x^2) + (2x + x) + (-5 + 3) = -x^2 + 3x - 2 \] Ahora, para la (13): \[ m + n - p - n - p + 2p - x = m + (n - n) + (-p - p + 2p) - x = m - x \] Siguiendo con la (16): \[ x + y + z - 2x - 6y + 3z + x + 5y - 8z = (x - 2x + x) + (y - 6y + 5y) + (z + 3z - 8z) = 0x + 0y - 4z = -4z \] Ahora, para la (14): \[ -83x + 82x + x + 21y + 6y - 25y - 28z = (-83x + 82x + x) + (21y + 6y - 25y) - 28z = 0x + 2y - 28z = 2y - 28z \] Y finalmente, la (17): \[ xy + yz + z - 8xy - 3yz - 3z + 5xy + 2yz - 2z = (xy - 8xy + 5xy) + (yz - 3yz + 2yz) + (z - 3z - 2z) = -2xy + 0yz - 4z = -2xy - 4z \] Así que los resultados reducidos son: 12. \( 17x - 17y \) 15. \( -x^2 + 3x - 2 \) 13. \( m - x \) 16. \( -4z \) 14. \( 2y - 28z \) 17. \( -2xy - 4z \) ¡Veamos cómo se divierten al reducir estas expresiones!

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