Réponses

2014-02-17T18:23:25+01:00
(3y-6)(3y+6)+(6y-4)²
9y²+18y -18y -36 + 36y²-48y +16
45y² -48y -20
2014-02-17T18:32:24+01:00
(3y-6)(3y+6)+(6y-4)² = 9y² -36 + 36y² - 48y + 16 = 45y² - 48y + 20