Bonjour,
A= 14x +8x²
B= 9x -21
C= 12a²+20a + 9a +15
=12a² +29a + 15
D= 12a² - 21a - 8a +14
= 12a² -29a + 14
E= 5x +2x²+20 +8x
= 2x² +13x +20
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Bonjour,
A= 14x +8x²
B= 9x -21
C= 12a²+20a + 9a +15
=12a² +29a + 15
D= 12a² - 21a - 8a +14
= 12a² -29a + 14
E= 5x +2x²+20 +8x
= 2x² +13x +20