Réponses

2013-04-08T18:39:44+02:00

A = 20x²-8x+15x-6) + 2x²+9x-14x-63)

A = 20x² - 8x + 15x -6 +2x² +9x -14x -63

A = 22x² +2x -69

 

B = 20x²-8x+15x-6 -2x²-9x+14x+63

B = 18x² +21x +57

 

C =( x/3+1 ) ( 4/3-x) = 4x /-4x+12

 

D =je lis -2 multiplié par x/10

= -2x/10