Pomocy z rozwiązaniem Zapisz w jak najprostszej postaci .
a) (x-2)-(2-x)=
b) (a+b)+(2a-b)-(a-2b)=
c) (3x-y+1)-(x+y)+(x-y)=
d) -(2a do kwadratu -3ab)-(2b-3a kwadrat )+(-ab-b)=
zad 2
zapisz w jak najprostszej postaci
a) (a+b)-(2a-b)-(a-2b)=
b) (3x-y+1)-(x+y)+(x-y)=
c) -(kx+ny)-(3kx+2ny)+(5kx-3ny)=
d) (2ab+a+3)-(3ab-a+3)=
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a) (x-2)-(2-x)=x-2-2+x=2x-4=2(x-2)
b) (a+b)+(2a-b)-(a-2b)=a+b+2a-b-a+2b=2a+2b=2(a+b)
c) (3x-y+1)-(x+y)+(x-y)=3x-y+1-x-y+x-y=3x-3y+1=3(x-y)+1
d) -(2a do kwadratu -3ab)-(2b-3a kwadrat )+(-ab-b)=-2a do kwadratu+3ab-2b+3a kwadrat-ab-b=a kwadrat+2a-3b=a(a+2)-3b
a) (a+b)-(2a-b)-(a-2b)=a+b-2a+b-a+2b=4b-2a=2(2b-a)
b) (3x-y+1)-(x+y)+(x-y)=3x-y+1-x-y+x-y=3x-3y+1=3(x-y)+1
c) -(kx+ny)-(3kx+2ny)+(5kx-3ny)=-kx-ny-3kx-2ny+5kx-3ny=kx-6ny
d) (2ab+a+3)-(3ab-a+3)=2ab+a+3-3ab+a-3=-ab+2a=a(-b+2)