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

Sagot :

a=-4x+5x=(+3)+30+(+3)
=5x4x=+3+30+3
=9x+36
B=6x+21x=24+49
=27x+73
C=-8x^2+12x+6x^2-12x
=8x^2+12x+6x^2-12x=14x^2+0x