Répondre :
a) (7x+1)²=49x²+14x+1
b) (x-3)²=x²-6x+9
c) ( 1/3 - 3/4a)²
=1/9-2*3/12a+9/16a²
=1/9-3/6a+9/16a²
=16/144+81/144-72/144a²
=97/144-1/2a²
d) (-3-2x)²=9+12+4x²
e) (5x-4)²=25x²-40x+16
f) (1/2x-4)²=1/4x²-4x+16
b) (x-3)²=x²-6x+9
c) ( 1/3 - 3/4a)²
=1/9-2*3/12a+9/16a²
=1/9-3/6a+9/16a²
=16/144+81/144-72/144a²
=97/144-1/2a²
d) (-3-2x)²=9+12+4x²
e) (5x-4)²=25x²-40x+16
f) (1/2x-4)²=1/4x²-4x+16
Bonsoir
a) (7x+1)² = 49x² +14x+3
b) (x-3)² = x² -6x +9
c) ( 1/3 - 3/4a)² = 1/9 - 6/12a+9/16a²
d) (-3-2x)² = 9 - 12x +2x²
e) (5x-4)² = 25x² -40x +16
f) (1/2x-4)² = 1/4x² - 8x/2 +16
a) (7x+1)² = 49x² +14x+3
b) (x-3)² = x² -6x +9
c) ( 1/3 - 3/4a)² = 1/9 - 6/12a+9/16a²
d) (-3-2x)² = 9 - 12x +2x²
e) (5x-4)² = 25x² -40x +16
f) (1/2x-4)² = 1/4x² - 8x/2 +16