Vengo a molestar
(x+1)(x-2) - (4x-1)(3x+5) -6 = 8x-11x (x-3)(x+7)
(x^2-2x+x-2)(12x^2+20x-13x-5)-6 = 8x-11(x^2+7x-3x-21)
x^2-2x+x-2-12x^2-20x+13x+5-6 = 8x-11x^2-77x+33x-231
-2x+x-20x+13x-8x+77x-33x = -231+6-5+2
18x = 234
x = 234/18
x = 13
*Los x^2 se eliminaron <3*
Para mi que lo escribí mal