5√(х-7) = 3√(х -1) |²
25(х - 7) = 9(х - 1)
25х - 175 = 9х -9
16х = 166
х = 166/16 = 83/8= 10 3/8
Проверка:
5√(10 3/8 - 7) = 5√27/8 = 5*3/2√3/2
3√(10 3/8 -1) = 3√75/8 = 3*5/2√3/2
Ответ: 10 3/8
1
3a²-1/4*ax-4a+5a³x
2
-6a^4b²+8a³b^5
3
5a²b³(3b^4-4a)
4
(x-y)(6ab^5+15a³b²)=3ab²(x-y)(2b³+5a²)
5
27x³y³-9x^4y-3xy³+9x5+9x^4y=27x³y³-3xy³+9x^5