MatemáticasBásico1 respuestas

Efectuar :E = (x + 6) (x - 6) + (x + 7) (7 - x) + (x + 8) (8 - x) + (x + 9) (x - 9)?

Efectuar : E = (x + 6) (x - 6) + (x + 7) (7 - x) + (x + 8) (8 - x) + (x + 9) (x - 9).

En resumen

E = (x + 6) (x - 6) + (x + 7) (7 - x) + (x + 8) (8 - x) + (x + 9) (x - 9) E = <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> - 6x + 6x - 36 + 7x - <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> + 49 - 7x + 8x - <img src="https://tex.z-dn.net/?

Mejor respuesta

Savmi23ou1fx3
9

E = (x + 6) (x - 6) + (x + 7) (7 - x) + (x + 8) (8 - x) + (x + 9) (x - 9)

E = <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> - 6x + 6x - 36 + 7x - <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> + 49 - 7x + 8x - <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> + 8x + 64 + <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> - 9x + 9x - 81

E = <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> - 36 + 49 - <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> - <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> + 64 + <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" /> - 81

E = - 36 + 49 + 64 - 81

E = - 4.