Matematyka z plusem 2 zad. 14/77 ZAPISZ W NAJPROSTSZEJ POSTACI: a) a-[a-(1-a)]=... b) -x-[-(1-x)-(x-1)]=... c) x-[y-(x-y)-x-(y-x)]=... d) a-1-[1-(a-1)-2a-(1-3a)]-a-1=...
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a)a-a+(1-a)=a-a+1-a=1-a
b)-x+(1-x)+(x-1)=-x+1-x+x-1=-x
c)x-y+(x-y)+x+(y-x)=x-y+x-y+x+y-x=2x-y
d)1-a-1+(a-1)+2a+(1-3a)-a-a=1-a-1+a-1+2a+1-3a-a-1=-2a-1