Salut
1. [tex]f_{1} (x) = (-2x+3)+(2-3x)[/tex]
[tex]-2x+3+2-3x=-5x+5[/tex]
2. [tex]f_{2} (x) = (-2x+3)-(2-3x)[/tex]
[tex]-2x+3 -2 +3x = x+1[/tex]
3. [tex]f_{3} (x) = (-2x+3)(2-3x)[/tex]
[tex]-4x +6x +6 -9x = -7x +6[/tex]
4. [tex]f_{4} (x) = 3x(-2x+3)-2x(2-3x)[/tex]
[tex]-6x +9x -4x +6x^{2} = -6x^{2} -x[/tex]
Bonne continuation :)
