(¹³√x⁸)⁾ =(x⁸/¹³)⁾ = (8/13)*x⁽⁸/¹³⁾ ⁻¹ = (8/13)*x⁽⁻⁵/¹³⁾ = 8 /(13* ¹³√x⁵)
(1/¹³√x⁸)⁾ =(x⁻⁸/¹³)⁾ = (-8/13)*x⁽⁻⁸/¹³⁾ ⁻¹ = (-8/13)*x⁽⁻²¹/¹³⁾ = - 8 /(13* ¹³√x²¹) =
= - 8 /(13*х *¹³√x⁸)
Корни х=п/4+пn;х=-п/2+2пn; промежутку принадлежат:2п;х=3п/4;7п/4
-3(a^2+2ab+b^2)=-3(a+b)^2
Вроде так
1. (3a — 1)(a + 5)(a — 7) = (3a — 1)(a² — 2a — 35) =
3a³ — 6a² — 105a — a² + 2a + 35 =
3a³ — 7a² — 103a + 35
2. (3a — 1)(2a + 2)(a + 3) = (3a — 1)(2a² + 8a + 6) =
6a³ + 24a² + 18a — 2a² — 8a — 6 =
6a³ + 22a² + 10a — 6