Réponses

2014-05-04T19:59:16+02:00
A = 15 y3 -5y²  -5y = 5y (3y² -y-1)

b = (5-t)² -(8-y) (5-4)
b = 25 -10t +t² -8 +y
b = t² -10t+y -17

ne peut être factorise

c =64 -( -5d -1)²
c = 64 -(25d² +10d +1)
c =64 -25d² - 10d -1
c = -25d²  -10d -63
ne peut etre factorise

d = 144a²-1
d = (12a -1) (12a+1)

e = 144a²-1-(5-2a)(12a+1)
e = (12a-1)(12a+1) -(5-2a)(12a+1)
e = (12a+1)  ( 12a-1 -5+2a)
e (12a+1) (14a -6)