Oblicz wartość liczbową wyrazenia
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-7y) dla x=-2, y=3
d) (6a-8b-0,7) - (6,9 +a-5b)+1,8 dla a=0,2 b=0,1
e)1/2abc-(4ab +2abc ) +(-bc + 5ab) dla a= -2 b=1/2 c=-4
plis<3
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a) -y +8x -z-2x dla x =-2, y=6, z= -3
-6+8*(-2)-(-3)-2*(-2)
-6-16+3+4
-22+7=-15
b) -8y-4z+x-y-2z+1 dla x= -0,5, y=-1, z=2
-9y-6z+x+1
-9*(-1)-6*2+(-0.5)+1
9-12-0.5+1
-3+0.5=-2.5
c) 9y-(7y+x)+(6x-7y) dla x=-2, y=3
9y-7y-x+6x-7y
-5y+5x
-5*3+5*(-2)
-15-10=-25
d) (6a-8b-0,7) - (6,9 +a-5b)+1,8 dla a=0,2 b=0,1
6a-8b-0.7-6.9-a+5b
5a-3b-7.6
5*0.2-3*0.1-7.6
1-0.3-7.6=-6.9
e)1/2abc-(4ab +2abc ) +(-bc + 5ab) dla a= -2 b=1/2 c=-4
1/2abc-4ab-2abc-bc+5ab
-1/2abc+ab-bc
-1.2(-2*1/2*-4)+(-2*1/2)+(1/2*-4)
-1/2*4+(-1)+(-2)
-2-1-2=-5