A = 11 + 2(x-6) +4(-3x-6) A = 11 + 2x -12 + (-12x -24) A = -10x -25
B = -2(x-5) -3(7-4x) B = -2x + 10 -21 +12x B = 10x -11
C = 8 +2y -5(2y-6) +4 C = 8 +2y -10y +30 +4 C = -8y +42
D= -7y -4(3y -6) +3 +2(3y-7) D = -7y -12y +24 +3 +6y -14 D = -13y +13
E = -5z + 5z(z-3) -7(6-8z) E = -5z +5z² -15z -42 +56z E= 5z² +36z -42
Exercice 27 A = x(x+6) -x A = x² +6x -x A = x² +5x
B= x(y-2) +xy B = xy -2x +xy B = 2xy -2x
C = 3x(x+4) -6x² C = 3x² +12x -6x² C = -3x² +12x
D = 9x(x² -6) +2x² D = 9x³ -54x +2x² D = 9x³ +2x² -54x
E = 5x(3+5x)+x(5+x)+4x(2x+1) E = 15x + 25x² +5x +x² +8x² +4x E = 34x² +24x
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Verified answer
Exercice 25A = 11 + 2(x-6) +4(-3x-6)
A = 11 + 2x -12 + (-12x -24)
A = -10x -25
B = -2(x-5) -3(7-4x)
B = -2x + 10 -21 +12x
B = 10x -11
C = 8 +2y -5(2y-6) +4
C = 8 +2y -10y +30 +4
C = -8y +42
D= -7y -4(3y -6) +3 +2(3y-7)
D = -7y -12y +24 +3 +6y -14
D = -13y +13
E = -5z + 5z(z-3) -7(6-8z)
E = -5z +5z² -15z -42 +56z
E= 5z² +36z -42
Exercice 27
A = x(x+6) -x
A = x² +6x -x
A = x² +5x
B= x(y-2) +xy
B = xy -2x +xy
B = 2xy -2x
C = 3x(x+4) -6x²
C = 3x² +12x -6x²
C = -3x² +12x
D = 9x(x² -6) +2x²
D = 9x³ -54x +2x²
D = 9x³ +2x² -54x
E = 5x(3+5x)+x(5+x)+4x(2x+1)
E = 15x + 25x² +5x +x² +8x² +4x
E = 34x² +24x
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