Réponses

2013-02-25T12:32:05+01:00

(3a+2)+(a-6) = 4a - 4


(4x-3)-(5x-2) = -x -1


5(x-2) = 5x-10


-3(2x-5) = -6x +15


2x(4x-3)-3x(5x-2) = -7x²

2013-02-25T12:32:21+01:00

(3a+2)+(a-6) = 3a + 2 + a - 6

                        = 4a - 4

 

(4x-3)-(5x-2) = 4x - 3 - 5x + 2

                       = -x -1

 

5(x-2) = 5x - 10

 

-3(2x-5) = -6x + 15

 

2x(4x-3)-3x(5x-2) = 8x² - 6x - 15x² + 6x

                               = -7x²