Réponses

2013-03-24T00:18:37+01:00

3y²+2² - 4y-1*3y+2 =
9y+4 - 3y*5y =
13y-15y = -2y
 

2013-03-24T00:43:49+01:00

(3y+2) (3y+2) - (4y-1) (3y+20)

( 3yx3y+3yx2+2x3y+2x2 ) - (4yx3y+4yx2-1x3y-1x2)

9y²+6y+6y+4 - 12y²+8y-3y-2

-3y²+23y-2

 

Factorisation : (3y+2) (3y+2) ((4y-1) (3y+20))

(3y+2) ((4y-1) (3y+20))