bonjour je dois trouver x sachant que:

Bonjour

5/2x + (-x -10x)(3-x^2) =

-x(-10(-3+x^2)-x^2) + 3+ 2x

5/2x -3x + x^3 -30x + 10x^3 =

-x(+30 -10x^2 -x^2) + 3 +2x

5/2x + 11x^3 -33x =

-30x +11x^3 + 3 + 2x

5/2x + 11x^3-33x+28x+11x^3 = 3

5/2x -5x = 3

5/2x -10/2x = 3

-5/2x = 3

X = 3* -2/5

X = -6/5