4 A = (-3x + 8) (- 4 - 5x) B=(-x-5) (9x + 2) C = (-3-2x) (5x - 6) D= (-7x+5)(-x-3) Vous pouvez m'aid.... Pergunta de ideia dejustinedebard

October 2023 1 21 Report

4 A = (-3x + 8) (- 4 - 5x) B=(-x-5) (9x + 2) C = (-3-2x) (5x - 6) D= (-7x+5)(-x-3)
Vous pouvez m'aidez svp

Bonjour,

A = (-3x + 8)(-4 - 5x)

A = 12x + 15x² - 32 - 40x

A = 15x² - 28x - 32

B = (-x - 5)(9x + 2)

B = -9x² - 2x - 45x - 10

B = -9x² - 47x - 10

C = (-3 - 2x)(5x - 6)

C = -15x + 18 - 10x² + 12x

C = -10x² - 3x + 18

D = (-7x + 5)(-x - 3)

D = 7x² + 21x - 5x - 15

D = 7x² + 16x - 15

justinedebard merci beaucoup