bonjour
A = 8 x - 10 + 5 x + 7 - 24 - 15 x
= - 2 x - 27
B = 9 x - 72 - x² + 3 x - 7 x + 63
= - x² + 5 x - 9
C= - 3 - 12 x - 20 x - 32 + 4 x² - 7 x
= 4 x² - 39 x - 35
D = 5 - 15 x² - 5 x - x² - 6 x + 4 x²
= - 12 x² - 11 x + 5
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bonjour
A = 8 x - 10 + 5 x + 7 - 24 - 15 x
= - 2 x - 27
B = 9 x - 72 - x² + 3 x - 7 x + 63
= - x² + 5 x - 9
C= - 3 - 12 x - 20 x - 32 + 4 x² - 7 x
= 4 x² - 39 x - 35
D = 5 - 15 x² - 5 x - x² - 6 x + 4 x²
= - 12 x² - 11 x + 5