- A= (-3x - 1)(2x - 2); B = 3(x - 1)(x + 5); C=-(4 - x)(2 - x) D= -2(a - 3)(a + 3) ; E = (t - 1)(-2t + 5); F = (b - 1)(b2 - 2b + 1) G= (x - 1)(x + 1)(x - 3) bon

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