Bonjour,
Exercice 1:
A = (x+10)² = x²+20x+100
B = (5x-7)(5x+7) = 25x²-49
C = (2X-5)² = 4x²-20x+25
D = (x-2)(x+2) = x²+4
E = (2x+3)² = 4xé+12x+9
F = (3x-8)² = 9x²-48x+64
Exo 2:
(2x+3)² = 4x²+12x+9
(5x+2)(5x-2) = 25x²-4
(7x-1)² = 49x²-14x+1
Exo 3:
G = (3x-1)²+5(3x-1)
1: G = 9x²-6x+1+15x-5 = 9x²+9x-4
2: Pour x=0 on a G = -4
3. Pour x = 1/3, on a G = 9*(1/3)² + 9*1/3 - 4 = 1 + 9/3 - 4 = 0
