Exercice 1:
1. A= (x-5)(3x-2)+(3x-2)(3x-2)
A=3x²-2x-15x+10+9x²-6-6+4
A= 12x²-29x+14
2. (x-5)(3x-2)+(3x-2)(3x-2)
(3x-2)[(x-5)+(7x+8)]
(3x-2)(4x+7)
3. (-1-5)(3*-1-2)+(3-1-1)(3-1-2)
(-6) * (-5) +(-5) *(-5)
30+25
55
Exercice2
a. C cube = c*c*c=5*5*5 = 125 cm cube
b. 1 sur 3 * base * h
6*6=36
1 sur 3*36*9=180 cm cube
c.L*l*h
4*5*6) 120 cm cube
d. pie * R²*h
pie * 1²*é= 6.3 cm cube
