Réponse :
Explications étape par étape
Bonsoir
5x * 3x
= 15x^2
-6x^2 + 4x + 2x + 7x^2 - x^2
= -7x^2 + 7x^2 + 6x
= 6x
x + x
= 2x
(-2x)(-4x)
= 8x^2
(3x + 2) - (3x + 9)
= 3x + 2 - 3x - 9
= -7
x * 6x
= 6x^2
3 - 5x
x * x
= x^2
2x * 4
= 8x
x^2 + 7x - 7(x^2 + x)
= x^2 + 7x - 7x^2 - 7x
= -6x^2
2x(2x + 1)
= 4x^2 + 2x
5x - (2x - 5)
= 5x - 2x + 5
= 3x + 5
-5x^2 + 7 + x + 6x^2 - x^2
= 6x^2 - 6x^2 + x + 7
= x + 7
2(x - 4x)
= 2x - 8x
(-4x^2 + 6x) / (6x^2 - 2x)
= 2x(-x + 3) / [2x(3x - 1)]
= (-x + 3) / (3x - 1)
5 * 3x
= 15x
-5x^2 - 3x^2
= -8x^2
5(-3x)
= -15x
2 + (6 - 2x)
= 2 + 6 - 2x
= -2x + 8
-7x - x
= -8x
(-3x)(-5x)
= 15x^2
