bonsoir
a = 6 x² + 9 x +3 x² - 6 - 2
= 9 x² + 9 x - 8
b = musique ce ?
c = 8 x +5 x - 2 x² - 7 x - 15 x + 8 x²
= 6 x² - 9 x
d = 6 x² + 3 x + 12 x - 9 x - 10 x² + x - 4
= - 4 x² + 7 x - 4
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bonsoir
a = 6 x² + 9 x +3 x² - 6 - 2
= 9 x² + 9 x - 8
b = musique ce ?
c = 8 x +5 x - 2 x² - 7 x - 15 x + 8 x²
= 6 x² - 9 x
d = 6 x² + 3 x + 12 x - 9 x - 10 x² + x - 4
= - 4 x² + 7 x - 4