ZAD 3
5x
x=1
5·1=5
x=0
5·0=0
x=-1
5·(-1)=-5
2x-4
x=1
2·1-4=2-4=-2
x=0
2·0-4=0-4=-4
x=-1
2·(-1)-4=-2-4=-6
x(x-1)
x=1
1·(1-1)=1·0=0
x=0
0·(0-1)=0·(-1)=0
x=-1
-1·(-1-1)=-1·(-2)=2
4-x
x=1
4-1=3
x=0
4-0=4
x=-1
4-(-1)=4+1=5
ZAD 4
a) 5x - x = 5 * (-2) - (-2) = - 10 + 2 = -8
b) (4 - x) - 3x = [4 - (-2)] - 3 * ( - 2) = 4 + 2 - ( - 6) = 6 + 6 = 12
c) -4x + 3 = -4 * (-2) + 3 = 8 + 3 = 11
