Daję Naj ;p
Wykonaj działania :
a) (3a-b) + (-2a + 4b)=
b) (2x-5y+3) - (3x+2y-4)=
c) 3•(a-2b+ 1 1/3)=
a][3a-b]+[-2a+4b]=3a-b-2a+4b=a+3bb][2x-5y+3]-[3x+2y-4]=2x-5y+3-3x-2y+4= -1x-7y+7c]3*[a-2b+1 1/3]=3a-6b+4
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a][3a-b]+[-2a+4b]=3a-b-2a+4b=a+3b
b][2x-5y+3]-[3x+2y-4]=2x-5y+3-3x-2y+4= -1x-7y+7
c]3*[a-2b+1 1/3]=3a-6b+4