Réponses

2013-12-11T16:37:34+01:00
Y²+16y+64 = (y+8)²

16y²-9 = (4y+3)(4y-3)

25y²-20y+4 = (5y-2)²

(a+8)² - 36 = (a+8+6)(a+8-6) = (a+14)(a+2)