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
