Bonsoir
N= -5(2a-3) = -10a +15
P= 6(-4+5b) = -24 +30b
R=-2+3(y-5) = -2 +3y -15 = 3y -17
S=7(b-3)-5(4-b) = 7b-21 - ( 20 -5b) = 7b -21 -20 +5b = 12b -41
T=3x -5+5(2x -2) = 3x -5 + (10x -10) = 3x -5 +10x -10 = 13x -15
U=4y-6(3-2y)+4(y-1) = 4y - (18 +12y) +4y -4 = 4y -18 -12y +4y -4 = -4y -22
V=5t au carré +3(2t-3)-2t(t-5) = 25 +6t-9 -(2t²-10t) = 25 +6t -9 -2t² +10t = -2t² +16t -16
