Oblicz: 2a²b+3ab²-aba= 2(3a+4ab)-(5a-5ab)+= 6a(2a²-3ab)+18a³+12ab= 14a²b-7ab --------------- - (2ab+b)= 7a

2a²b+3ab²-aba=2a²b-3ab²-a²b=a²b+3ab² 2(3a+4ab)-(5a-5ab)+=6a+8ab-5a+5ab=a+13ab 6a(2a²-3ab)+18a³+12ab=12a³-18a²b+18a³+12ab=30a³-18a²b+12ab 14a²b-7ab --------------- - (2ab+b)=[(14a²b:7a)-(7ab:7a)]-(2ab+b)=2ab-b-2ab-b=-2b 7a

[latex]1.\\2a^{2}b+3ab^{2}-aba = 2a^{2}b+3ab^{2}-a^{2}b = a^{2}b+3ab^{2}[/latex] [latex]2.\\2(3a+4ab)-(5a-5ab) = 6a+8ab-5a+5ab= a+13ab[/latex] [latex]3.\\6a(2a^{2}-3ab)+18a^{3}+12ab=12a^{3}-18a^{2}b+18a^{3}+12ab = \\=30a^{3}-18a^{2}+b+12ab[/latex] [latex]4.\\frac{14a^{2}b-7ab}{7a}-(2ab+b) = 2ab-b-2ab-b = -2b[/latex]