Sagot :
Bonsoir
A= (-3x - 1)(2x - 2)
A = - 6x² + 6x - 2x + 2
A = - 6x² + 4x + 2
B = 3(x - 1)(x + 5)
B = 3 (x² + 5x - x - 5)
B = 3x² + 15x - 3x - 15
B = 3x² + 12x - 15
C=-(4 - x)(2 - x)
C = - (8 - 4x - 2x + x²)
C = - 8 + 4x + 2x - x²
C = - x² + 6x - 8
D= -2(a - 3)(a + 3)
D = - 2 (a² - 9)
D = - 2a² + 18
E = (t - 1)(-2t + 5)
E = - 2t² + 2t + 2t - 5
E = - 2t² + 4t - 5
F = (b - 1)(b2 - 2b + 1)
F = b³ - 2b² + b - b² + 2b - 1
F = b³ - 3b² + 3b - 1
G= (x - 1)(x + 1)(x - 3)
C = (x² + x - x + 1) (x - 3)
C = x³ - 3x² + x² - 3x - x² + 3x + x - 3
C = x³ - 3x² + x - 3.
Bonjour,
A= (-3x - 1)(2x - 2)
= -6x² +6x -2x +2
= -6x² +4x +2
; B = 3(x - 1)(x + 5)
= (3x-3) ( x+5)
= 3x² +15x -3x -15
= 3x² +12x -15
; C=-(4 - x)(2 - x)
= -8 +4x +2x -x²
= -x +6x -8
D= -2(a - 3)(a + 3)
= -2a² -6a +6a +9
= -2a² +9
; E = (t - 1)(-2t + 5)
= -2t² +5t +2t -5
= -2t² +7t -5
; F = (b - 1)(b² - 2b + 1)
b³ -2b² +b -b² +2b -1
= b³ -3b² +3b -1
G= (x - 1)(x + 1)(x - 3)
=( x² +x -x -1)( x-3)
= x³ -3x² -x +3