1) 1,5x + 3 - 6 + 3x = 4,5x-3;
2) (20x-32-15x^2+24x)+15x^2= 44x-32;
3) a^(3*9):a^(3*6)=a^27:a^18=a^(27-18)=a^9;
4) 25 - 20x + 4x^2;
1) 1,5x + 3 - 6 + 3x = 4,5x-3;
2) (20x-32-15x^2+24x)+15x^2= 44x-32;
3) a^(3*9):a^(3*6)=a^27:a^18=a^(27-18)=a^9;
4) 25 - 20x + 4x^2;