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Exercice 1 :
Développer et réduire les expressions suivantes :
A= -4(x+3) +506 + x) B = 3(8 + 2x)+7(3x + 7)
;
C = 4x(-2x + 3) + 2x(3x-6)
D = 5x(6-7x) - x(8 + 2x)
;
E = 6x(3x + 4) + 4(5x + 6)
F = -3x(-2x+6) + x(4x - 2)
G=-4(6 + 5x) + 9x(2x - 3)
3
H = 7x(3x - 2) - X(-6+ x)
;
I = -3x(-2x+6) + x(4x - 2)

Sagot :

A=-4x-12+506
=494-4x
B=24+6x+21x+49
24+49=6x+21x
73+27x
C=-8x^2+12x+6x^2-12x
=14x^2+0x
D=30x-35x^2-8x-2x^2
35x^2-2x^2=+30x-8x
33^2=22x
E=18x^2+24x+20x+24
18x^2+24x+20x=24
=18x^2+44x+24
F=+6x^2-18x+4x^2-2x
6x^2+4x^2-18x-2x
=10x^2-20x
G=-24-20x+18x^2-27x
=18x^2-47x-24
H=21x^2-14x+6x-1x^2
22x^2-20x
I=6x^2-18x+4x^2-2x^2
12x^2-18x