Bonjour,
Exercice 4) : Factoriser :
[tex]E = (x + 2)(x + 1) - 5(x + 2)[/tex]
[tex]E = (x + 2)(x + 1 - 5)[/tex]
[tex]\boxed{E = (x + 2)(x - 4)}[/tex]
[tex]F = 25x {}^{2} - 60x + 36[/tex]
[tex]F = 5 {}^{2} x {}^{2} - 2 \times 5x \times 6 + 6 {}^{2} [/tex]
[tex]F = (5x) {}^{2} - 2 \times 5x \times 6 + 6 {}^{2} [/tex]
[tex]\boxed{ F = (5x - 6) {}^{2} }[/tex]
[tex]G = 6x - 15[/tex]
[tex]\boxed{ G = 3(2x - 5)}[/tex]
Bonne journée.
