Oblicz wartość liczbowa wyrażynia
1. -y + 8x - z - 2x dla x= -2 y=6 z= -3
2. -8y - 4z +x -y - 2z + 1 dla x= -0.5 y= -1 z= 2
3. 9y - ( 7y + x ) + ( 6x - 7y ) dla x= -2 y = 3
4. (6a - 8b - 0.7 ) - (6.9 + a - 5b ) +1.8 dla x= 0.2 b= 0.1
5. 1/2abc - ( 4ab + 2abc ) + ( -bc + 5ab) dla a= -2 b= 1/2 c=-4
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-6+8*(-2)-(-3)-2*(-2)=-6-16+3+4=-15
-8*(-1)-4*2+(-0,5)-(-1)-2*2+1=
8-8-0,5+1-4+1=-2,5
9*3-(7*3-2)+[6*(-2)-7*3]=
9*3-(21-2)+(-12-21)=
9*3-19-33=27-19-33=-25
(6*0,2-8*0,1-0,7)-(6,9+0,2-5*0,1)+1,8=
(1,2-0,8-0,7)-(6,9+0,2-0,5)+1,8=
-0,3-6,6+1,8=-5,1
1/2*(-2)*1/2*(-4)-[4*(-2)*1/2+2*(-2)*1/2*(-4)]+[-1/2*(-4)+5*(-2)*1/2]=
1/2*(-2)*1/2*(-4)-(-4+8)+(2-5)=
1/2*(-2)*1/2*(-4)-4-3=2-4-3=-5