Sagot :
Bonjour
Développer et réduire les expressions suivantes
A = 3x + 1)(x - 5)
A = 3x² - 15x + x - 5
A = 3x² - 14x - 5
B = 2(-3 - t)(t-7)
B = 2 (- 3t + 21 - t² + 7t)
B = - 6t + 42 - 2t² + 14t
B = - 2t² + 8t + 42
C = -(y + 5)(3y - 6)
C = - (3y² - 6y + 15y - 30)
C = - 3y² + 6y - 15y + 30
C = - 3y² - 9y + 30
D = x(2x - 5)(2 - x)
D = x (4x - 2x² - 10 + 5x)
D = 4x² - 2x³ - 10x + 5x²
D = - 2x³ + 9x² - 10x.
Bjr
A = (3x+1)(x-5)
A = 3x²-15x+x-5
A = 3x²-14x-5
B = 2(-3-t)(t-7)
B = 2(-3t+21-t²+7t)
B = -6t+42-2t²+14t
B = -2t²+8t+42
C = -(y+5)(3y-6)
C = -(3y²-6y+15y-30)
C = -3y²+6y-15y+30
C = -3y²-9y+30
D = x(2x-5)(2-x)
D = x(4x-2x²-10+5x)
D = 4x²-2x³-10x+5x²
D = -2x³+9x²-10x
Petit conseil relisez vos leçons.
Bonne journée.