(x^2-1)(x^4+x^2+1)-(x^2-1)(x^2-1)(x^2-1)=(x-1)(x+1)(x^2-x+1)*(x^2+x+1)-(x-1)(x+1)(x-1)^2*(x+1)^2=3x^4-3x^2=3x^2(x-1)(x+1)
6.3x-4-21.6x-0.9=-15.3x-4.9. Подставим x
-51-4.9=-55.9
1) 49 = 7 * 7
2) 35 = 7 * 5
3) 50 = 5 * 5 * 2
................................
49 * 35 * 50 = 7 * 7 * 7 * 5 * 5 * 5 * 2 = ( 7 * 7) * 7 * ( 5 * 5 ) * 5 * 2
.....................
V ( 49 * 35 * 50) = ( 7 * 5) V ( 7*5*2) = 35 V 70
ОТВЕТ 35 V 70