Réponse :
Explications étape par étape
Bsr,
Exercice 1
108
108/2 = 54
54/2 = 27
27/3 = 9
9/3 = 3
=>
2*2*3*3*3
432
432/2 = 216
216/2 =108
108/2 =54
54/2 27
27/3 =9
9/3 = 3
=>
2*2*2*2*3*3 *3
588
588/2 =294
294/2 =147
147/3 =49
49/7 = 7
=>
2*2*3*7*7
exercice 2
108/432 =
2*2*3*3*3 = 108
=> 1/ 4
588/108
2*2*3= 12
=>49/9
432/588
2*2*3=12
=>
36/49
2.1
D = 4x² +12x +9 + 2x² +3x -10x -15 =
6x² =5x -6
2.2
(2x+3) ( 2x+3 +x-5) => (2x+3) (3x -2)
2.3
x=1
(2+3) (3 -2) = 5*1 = 5
x = 2/3
(4/3+3) (6/3 -2) = 24/6 -8/3 +18/3 -6=
12/3 -8/3 +18/3 -18/3 = 4/3
☺
