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2) (2y-8)(7-y^2) = - 2y^3 + 8y^2 + 14y - 56
(a+2b)(a^2 - 2ab + 4b^2) = a^3 + (2b)^3
(a-6)(a^2 + 2) - (4a + 1)(a-3) = a^3 - 4a^2 + 2a - 12 = 3^3 - 4 * 3^2 + 2 * 3 - 12 = 27 - 36 + 6 - 12 = - 15
(2x-4)(6x+3) = (3x-2)(4x-1)
12x^2 - 18x - 12 = 12x^2 - 11x + 2
11x - 18x = 14
-7x = 14
x = -2
(x-1)(x+1)(x^2+1)(x^4+1) = x^4 - 1 = 2^4 - 1 = 16 - 1 = 15
|(x-1)(x+1)| = 0
(x-1)(x+1) = 0
x^2-1 = 0
x^2 = 1
x = 1; x = -1
-(x-1)(x+1) = 0
(1-x)(1+x) = 0
1 - x^2 = 0
x^2 = 1
x = 1; x = -1
Ответ: -1; 1