AIDER MOI PLZZZZ QUESTION À 20 points

Réponse :

bonjour,

C + D

= ( -3x + 1 ) + (x -2 )

= -3x + 1 + x - 2

= -2x - 1

-5×C

= -5 × ( - 3x + 1 )

= 15x -5

D×10

= 10 × (  x - 2 )

= 10x -20

C ×D

= ( -3x + 1 ) × (x -2 )

= -3x × x - 3x ×(-2)  + x ×1 - 2 × 1

= -3x² +6x + x - 2

= -3x² + 7x - 2

voila:)