Réponses

2013-10-27T18:13:32+01:00
= ( 2y + 7 ) ( y + 5 ) + 2 ( 3y - 2 )
= 2y * y + 2y * 5 + 7 * y + 7 * 5 + 2 * 3y + 2 * (-2)
= 2y^2 + 10y + 7y + 35 + 6y - 4
= 2y^2 + 17y + 6y + 31
= 2y^2 + 23y + 31