1. Zapisz w jak najprostszej postaci
a) X+Y
b) Y-2Z
c) X-Y-Z
d) 2(X-Y)
x= 6a-2c(kwadrat)+10
y= 9-3a+c(kwadrat)
z= 5c(kwadrat)-9a+3
2. Oblicz wartość wyrażeń z zadania 1 dla:
a=2
c= -1
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a)6a-2c^{2}+10+9-3a+c^{2}=3a-c^{2}+19
b)(9-3a+c^{2})-2(5c^{2}-9a+3)=9-3a+c^{2}-10c^{2}+18a-6=3+15a-9c^{2}
c)(6a-2c^{2}+10)-(9-3a+c^{2})-(5c^{2}-9a+3)=6a-2c^{2}+10-9+3a-c^{2}-5c^{2}+9a-3=18a-8c^{2}-2
d)2[(6a-2c^{2}+10)-(9-3a+c^{2})]=2(6a-2c^{2}+10-9+3a-c^{2})=12a-4c^{2}+20-18+6a-2c^{2}=6a-6c^{2}+2
zad.2
x=6*2-(2*(-1)^{2})+10=12-(2*1)+10=12-2+10=20
y=9-3*2+(-1)^{2}=9-6+1=4
z=5*(-1)^{2}-9*2+3=5*1-18+3=5-18+3=-10
zad 1
a)X+Y=6a-2c(kwadrat)+10+9-3a+c(kwadrat)=6a-3a-2c(kwadrat)+c(kwadrat)
+10+9=3a-c(kwadrat)+19
b)Y-2Z=9-3a+c(kwadrat)-2*5c(kwadrat)-9a+3=9-3a+c(kwadrat)-10c(kwadrat)
-9a+3=9+3-3a-9a+c(kwadrat)-10c(kwadrat)=12-12a-9c(kwadrat)
c)X-Y-Z=6a-2c(kwadrat)+10-9-3a+c(kwadrat)-5c(kwadrat)-9a+3
=6a-3a-9a-2c(kwadrat)+c(kwadrat)-5c(kwadrat)+10-9+3
=(-6a)-6c(kwadrat)+4
d)2(X-Y)=2(6a-2c(kwadrat)+10-9-3a+c(kwadrat))
=12a-4c(kwadrat)+20-18-6a+2c(kwadrat)
=12a-6a-4c(kwadrat)+2c(kwadrat)+20-18
=6a-2c(kwadrat)+2
zad 2
a)3a-c(kwadrat)+19=3*2-(-1)(kwadrat)+19=6-1+19=5+19=24
b)12-12a-9c(kwadrat)=12-12*2-9*(-1)(kwadrat)=12-12*2-9*1=12-24-9=-21
c)-6a-6c(kwadrat)+4=(-6)*2-6*(-1)(kwadrat)+4=-12-6*1+4=12-6+4=10
d)6a-2c(kwadrat)+2=6*2-2*(-1)(kwadrat)+2=6*2-2*1+2=12-2+2=12