[tex](2a {}^{2} - 3a + 1) - (7a {}^{2} - 5a) = \\ = 2a { }^{2} - 3a + 1 - 7a {}^{2} + 5a = \\ =2a {}^{2} - 7a {}^{2} = - 5a {}^{2} \\ - 3a + 5a = 2a \\ - 5a {}^{2} + 2a + 1[/tex]
[tex]3x(4x {}^{2} - x) = 12x {}^{3} - x[/tex]
[tex](a - 5)(a - 3) = a {}^{2} + 15[/tex]
Sper ca te-am ajutat succes in continuare!!
