Oblicz wartość liczbową wyrażenia.
a) -y +8x - z - 2x DLA: x = -2, y = 6, z = -3
b) -8y - 4z +x - y - 2z +1 DLA: x = -0,5, y = -1, z= 2
c) 9y - (7y + x) + (6x - 7) DLA: x = -2, y = 3
d) (6a - 8b - 0,7) - (6,9 + a - 5b) + 1,8 DLA: a = 0,2, b = 0,1
e) abc - (4ab + 2abc) + (-bc + 5ab) DLA: a = -2, b = , c = -4
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a) -6+8*(-2)-(-3)-2*(-2)=-6-16+3+4=-15
b) -8*(-1)-4*2-0,5-(-1)-2*2+1=8-8-0,5+1-4=-3,5
c) 9*3-(7*3-2)+(6*(-2)-7)=27-(21-2)+(-12-7)=27-19-19=-11
d) (6*0,2-8*0,1-0,7)-(6,9+0,2-5*0,1)=(1,2-0,8-0,7)-(6,9+0,2-0,5)=-0,3-(6,6)=-6,9
e) 1/2abc - (4ab + 2abc) + (-bc + 5ab) DLA: a = -2, b = 1/2, c = -4
1/2*(-2)*1/2*(-4)-(4*(-2)*1/2 + 2*(-2)*1/2 * (-4)) + (-1/2*(-4) + 5*(-2)*1/2)=-1*(-2)-(-4+8) + (2-5)=
2-4-3= -5