Réponses

  • Utilisateur Brainly
2014-05-25T17:34:20+02:00
(4x+1)² - (4x+1)(7x-6) =
(4x+1)(4x+1-7x+6) =
(4x+1)(-3x+7)

pour x= V3
(4V3+1)(-3V3+7) =
-36+28v3-3v3+7 =
25V3-29
2014-05-25T17:57:04+02:00
(4x+1)² - (4x+1)(7x-6)= (4X+1)(4x+1-7x+6)
= (4x+1) (-3x+7)

on remplace x = √3
= (4√3+1)(-3√3+7)
= -12√3√3+28√3-3√3+7
= -12*3+25√3+7
= -36+7+25√3
= -29+25√3