Réponses

  • Utilisateur Brainly
2014-09-25T22:47:53+02:00
X² - 3/7

Avec x = 4/5

(4/5)² - 3/7
= 4²/5² - 3/7
= 16/25 - 3/7
= (16 x 7)/(25 x 7) - (3 x 25)/(7 x 25)
= 112/175 - 75/175
= 37/175
Meilleure réponse !
2014-09-25T22:56:42+02:00

 Bonjour


x² - 3/7                           pour x = 4/5

(4/5)² - 3/7

= 16/25 - 3/7

= 112/175 - 75/175

= 37/175