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Sagot :

Bonjour

E=3(2x-1)-(3x+2)(5-x)
E=6x-3-(3x+2)(5-x)
E=6x-3-(15x-3x²+10-2x)
E=6x-3-(13x-3x²+10)
E=6x-3-13x+3x²-10
E=-7x-13+3x²
E=3x²-7x-13

Réponse :Hello ,

E=3(2x-1)-(3x+2)(5-x)

= 3 × 2x -3 × -1 -3x × 5 + 3x × -x + 2×5 + 2× -x

=6x -3 - ( 15x - 3x² + 10 - 2x )

=6x -3 - ( 13x - 3x² + 10 )

=6 x -3 - 13x + 3x² - 10

=-7x - 13 + 3x²

=3x² - 7x -13

Bonne continuation !!

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