zapisz w jak najprostrzej postaci:
a). (a+b)-(2a-b)-(a-2b)
b). (3x-y+1)-(x+y)+(y-x)
c). -(kx+ny)-(3kx+2ny)+(5kx-3ny)
d). (2ab+a+3)-(3ab-a+3)
...to jest z działu ,,wyrażenia algebraiczne,, prosze o pomoc bo tego nie kapuje
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a). (a+b)-(2a-b)-(a-2b)=a+b-2a-b-a-2b=-2a-2b
b) (3x-y+1)+(x+y)+(y-x)=3x-y+1+x+y+y-x=3x+y+1
c)-(kx+ny)-(3kx+2ny)+(5kx-3ny)=-kx+ny-3kx+2ny+5kx-3ny=7kx
d) (2ab+a+3)-(3ab-a+3)=2ab+a+3-3ab-a+3=-1ab+6
a). (a+b)-(2a-b)-(a-2b) = a + b - 2a + b - a + 2b = 4b - 2a = 2(2b - a)
b). (3x-y+1)-(x+y)+(y-x) = 3x - y + 1 - x - y +y - x = 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 = 2a - ab = a(2 -b)