bonjour
A = x² + 2 x + 1 + x² - 6 x + 9
= 2 x² - 4 x + 10
B = 16 x² + 24 x + 9 + 2 x² + 7 x - 14 x - 49
= 18 x² + 17 x - 40
C = 4 x² + 4 x + 1 - ( x² - 49)
= 4 x² + 4 x + 1 - x² + 49
= 3 x² + 4 x + 49
d = x² - 10 x + 25 - ( 2 x² - 10 x - 7 x + 35 )
= x² - 10 x + 25 - 2 x² + 17 x - 35
= - x² + 7 x - 10
vu en 3ème
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bonjour
A = x² + 2 x + 1 + x² - 6 x + 9
= 2 x² - 4 x + 10
B = 16 x² + 24 x + 9 + 2 x² + 7 x - 14 x - 49
= 18 x² + 17 x - 40
C = 4 x² + 4 x + 1 - ( x² - 49)
= 4 x² + 4 x + 1 - x² + 49
= 3 x² + 4 x + 49
d = x² - 10 x + 25 - ( 2 x² - 10 x - 7 x + 35 )
= x² - 10 x + 25 - 2 x² + 17 x - 35
= - x² + 7 x - 10
vu en 3ème