Sagot :
[tex]E = -4x-12 + 30 +5x \\E = x + 18 \\\\F = 24 + 6x +21x + 49 \\F = 27x + 43 \\\\G = -8x^2+12x+6x^2-12x \\G = -2x^2 \\\\H=30x-35x^2-8x-2x^2 \\H=-27x^2+22x[/tex]
E = - 4 (x +3) + 5 (6+x)
E = -4x -12 + 30+ 5x
E= x + 18
F = (8+ 2x) * 3 +7 (3x+7)
F = 24 + 6x + 18x+ 7
F = 31 + 24 x
G = 4x (-2x +3) + 2x (3x-6)
G= -8x +12x +6x - 12x
G= -2x
H= 5x (6 -7x) - x (8+2x)
H= 30x - 35x -8x +2x
H= 32x - 43 x
H = -9 x