Bonsoir,
Ex 1 :
A=(5+2^5)*3 = (5+32)*3 = 37*3 = 111
B=(2+3)²-2*10 = 5²-20 = 25-20 = 5
C=(-5)²-3^3+2 = 25-27+2 = -2+2 = 0
Ex 2 :
D=3(y-7)+2y-4 = 3y-21+2y-4 = 5y-25
E=z(3-z)-5(4z-9) = 3z-z²-20z+45 = z²+3z+45
F=t(t-2)-(t-3t²) = t²-2t-t+3t² = 4t²-t
G=5(c-1)+5(3-5c) = 5c-5+15-25c = -20c+10
H=2(-6+h)+(h-12) = -12+2h+h+12 = 3h
I=2(a+b)-7(a+b) = 2a+2b-7a-7b = -5a-5b
