Bonjour,
Merci la prochaine fois de recopier les expressions ici !
Développer puis réduire si possible chaque expression :
A = 2x (x + 3)
A= 2x² + 6x
B = - 7y² (- 5 - 2y²)
B = 35y² + 14y⁴
B = 14y⁴ + 35y²
C = (x + 5) (x + 1)
C = x² + x + 5x + 5
C = x² + 6x + 5
D = (2x - 5) (x + 4)
D = 2x² + 8x - 5x - 20
D = 2x² + 3x - 20
E = (4 - a)²
E = 16 - 8a + a²
E = a² - 8a + 16
F = (2x + 3)²
F = 4x² + 12x + 9
G = (4 - 7x) (4 + 7x)
G = 16 - 49x²
H = (x + 4) (x - 6) + (- 1 + x) (x - 7)
H = x² - 6x + 4x - 24 - x + 7 + x² - 7x
H = x² + x² - 6x - x - 7x + 4x - 24 + 7
H = 2x² - 10x - 17
I = - 3 (a² + 2) - (a - 3) (2a + 7)
I= - 3a² - 6 - (2a² + 7a - 6a - 21)
I = - 3a² - 6 - 2a² - 7a + 6a + 21
I = - 3a² - 2a² - 7a + 6a - 6 + 21
I = - 5a² - a + 15
J = 4 - (2x + 1)²
J = 4 - (4x² + 4x + 1)
J = 4 - 4x² - 4x - 1
J = - 4x² - 4x + 4 - 1
J = - 4x² - 4x + 3.
