Réponse :

Explications étape par étape

Bonjour

-2x + 5 - 4x + 3

= -2x - 4x + 5 + 3

= -6x + 8

-5x + 4x + 3

= -x + 3

x^2 + x + 3x + 5x^2 + 1

= x^2 + 5x^2 + x + 3x + 1

= 6x^2 + 4x + 1

6x^2 - 3 + 5x - 7x^2 + 4 - 2x

= 6x^2 - 7x^2 + 5x - 2x + 4 - 3

= -x^2 + 3x + 1

-2x * 3x + 2x + 3x^2 - 4x

= -6x^2 + 3x^2 + 2x - 4x

= -3x^2 - 2x

2 * (3x^2) - (4x) * x + x^2

= 6x^2 - 4x^2 + x^2

= 3x^2