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LindaLicornes
@LindaLicornes
May 2019
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Bonjour ! merci de bien vouloir m'aider pour ces deux expressions ! il faudrait les réduires en détaillant les calculs . merci d'avance:)
B= -7a au carré + a x (4a-9a) + (-5 + 2a)-6a
D= 3+(2×a-12) + 15a au carré - 9a + a × 4a au carré
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taalbabachir
Verified answer
B = - 7a² + a x (4a - 9a) + (- 5 + 2a) - 6a
= - 7a² + a x (- 5a) + (- 5 + 2a) - 6a
= - 7a² - 5a² - 5 + 2a - 6a
= - 12a² - 4a - 5
D = 3 + (2a - 12) + 15a² - 9a + 4 x 4a²
= 3 + 2a - 12 + 15a² - 9a + 16a²
= 31a² - 7a - 9
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Thanks 1
LindaLicornes
merci beaucoup, vraiment ! ❤❤
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Bonjour, merci de bien vouloir me donner votre aide, car je cale sur ces deux exercices de mon dm. Merci d'avance.
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Verified answer
B = - 7a² + a x (4a - 9a) + (- 5 + 2a) - 6a= - 7a² + a x (- 5a) + (- 5 + 2a) - 6a
= - 7a² - 5a² - 5 + 2a - 6a
= - 12a² - 4a - 5
D = 3 + (2a - 12) + 15a² - 9a + 4 x 4a²
= 3 + 2a - 12 + 15a² - 9a + 16a²
= 31a² - 7a - 9