(5a -b+1) - (6a-b+1) =...................................
(3a DO POTEGI 2 - 2b - 4) + (-3a DO POTEGI 2 - 4b - 1) = ...................
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(5a -b+1) - (6a-b+1) =5a-b+1-6a+b-1=-a
(3a² - 2b - 4) + (-3a²- 4b - 1) =3a²-2b-4-3a²-4b-1=-6b-5
(5a -b+1) - (6a-b+1) = 5a-b+1-6a+b-1= -1a
(3a DO POTEGI 2 - 2b - 4) + (-3a DO POTEGI 2 - 4b - 1) =
3a DO POTEGI 2- 2b -4 -3a DO POTEGI 2 -4b -1=
= -6b -5