Réponses

2014-10-05T14:19:37+02:00

Soit x = 10 000 :

A = (x - 4)² - (x - 2) (x - 8)

A = (10 000 - 4)² - (10 000 - 2) (10 000 - 8)

A = 99 920 016 - 9 998 × 9 992

A = 99 920 016 - 99 900 016

A = 20 000


  • Utilisateur Brainly
2014-10-05T15:11:07+02:00
(x - 4)² - (x - 2)(x - 8)
= x² - 8x + 16 - (x² - 8x - 2x + 16)
= x² - 8x + 16 - x² + 8x + 2x - 16
= 2x

Si x = 10 000 :

2 x 10 000
= 20 000