(a²-9b²)(a²+9b²)(a^4+81b^4)*3^8*b^8=(a^4-81b^4)*(3b)^8=
=(a^8-(3b)^8)*(3b)^8=(3ab)^8-(3b)^16
1) 6 x - 10,2 = 4 x = - 2,2 x/0,2
2 x = 8 X = 4
2) 15 - ( 3 x - 3) = 5 - 4 x - 3 x + 4 x = 5 - 15 - 3 x = - 13
3) 2 x - 1 + 1 = 9
2 x = 9 + 1 - 1
2 x = 9
X = 4, 5
1,2,3,4...-это решение. Удачи