Sagot :
[tex]2 \times 3x + 3x \times 4x + 2 \times 3 + 2 - 2x - 4x \times x \ \\ 6x + 12x {}^{2} + 6 + 2 - 2x - 4x {}^{2} \\ 12x { - 4x {}^{2} } + 6x - 2x + 8 \\ 8 {}^{2} + 4x + 8[/tex]
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Réponse:
Pour la 1ère question g pas très bien compris
2.
F = 4 + 3x - 2 + 4x - x -2x + x
= 4 - 2 + 3x +4x - x - 2x + x
= 2 + 7x
G = 4x + x - (6+5x) + 3x - (10 - 8x) + 2x
= 4x + x - 6 - 5x + 3x - 10 + 8x + 2x
= 4x + x - 5x + 3x + 8x +2x - 6 - 10
= 13x - 16
3.
I = 6(x + 2) + 5(3 + x)
= 6x + 12 + 15 + 5x
= 11x + 27
J= 8(x2 + x) - 4(x2 - 1) +2(x-7)
= 16x + 8x - 8x + 4 +2x - 14
= 18x - 10
K=2(x - 1)-3(2-x)+4(1-x) + 3x
= 2x - 2 - 6 + 3x + 4 - 4x + 3x
= 4x - 4