Bonsoir,
1 post = 1 exercice stp
Ex. 4 :
distributivité......
2(x-2)+3(x+2) = 2x-4+3x+6 = 5x+2
4(1-x)+(3x+1) = 4-4x+3x+1 = 5-x
3(2x-5)-2(x-1) = 6x-15-2x+2 = 4x-13
3(3x-2)-(2-x) = 9x-6-2+x = 10x-8
tu finis ?
Ex. 5 :
double distributivité....
(x+1)(2x+1) = 2x²+x+2x+1 = 2x²+3x+1
(3x+1)(2x+2) = 6x²+6x+2x+2 = 6x²+8x+2
(2x+1)(5-2x) = 10x-4x²+5-2x = -4x²+8x+5
(3x-2)(1-x) = 3x-3x²-2+2x = -3x²+5x-2
tu finis ?
