Answered

Réduire les expressions suivantes : A = 5a + 3a + 7b + 6b B = 7x + 5y - 3x – 12y C = 6x ² + 12 + 3x ² + 5x + 2x D = 9x ² - 12x + 7 - 15 - 3x + 4x ² Merci au personne qui m'aiderons

Sagot :

Bonjour,

5a + 3a + 7b + 6b = 8a + 13b

7x + 5y - 3x - 12y = 7x - 3x + 5y - 12y = 4x - 7y

6x² + 12 + 3x² + 5x + 2x = 6x² + 3x² + 5x + 2x + 12 = 9x² + 7x + 12

9x² - 12x + 7 - 15 - 3x + 4x² = 9x² + 4x² - 12x - 3x + 7 - 15 = 13x² - 15x - 8

Kavitha01

Réponse:

Bonjour,

A = 5a + 3a + 7b + 6b

=8a+13b

B = 7x + 5y - 3x – 12y

= 7x-3x+5y-12y

=4x-7y

C = 6x ² + 12 + 3x ² + 5x + 2x

=6x²+3x²+5x+2x+12

=9x²+7x+12

D = 9x ² - 12x + 7 - 15 - 3x + 4x ²

=9x²+4x²-12x-3x+7-15

=13x²-15x-8