(x+1)(x+2)-(x-3)(x+4)=6
(x+1)(x+2)-(x-3)(x+4)=6 (х^2+3x+2)-(x^2+x-12)=6 x^2+3x+2-x^2-x+12=6 2x+14=6 2x=-8 x=-4
x^2+2x+x+2-x^2-4x+3x+12=6
2x+14=6
2x=-8
x=-4