Aide pour l’équation svp

    (2x+3)(5x-4)-10x² = -2(4-6x)
⇒ 10x²-8x+15x-12-10x² = -8+12x
⇒ 7x-12 = -8+12x
⇒ 7x-12x = -8+12
⇒ -5x = 4
⇒ x = -4/5

Bonsoir,

(2x + 3)(5x - 4) - 10x² = -2 (4 - 6x)
10x² - 8x + 15x - 12 - 10x² = -8 + 12x
7x - 12 = -8 + 12x
-12 + 8 = 12x - 7x
-4 = 5x
-4/5 = x