Tìm : 1, x^3 - + * - * = (- 2y)^32; (- 2)(3x + * ) = 9x^2 - 43; 27x^3 - 1 = (3x - )(9x^2 - + 1)

tìm *
1, x^3- * + * - *=(*-2y)^3
2, (*-2)(3x+*)=9x^2-4
3, 27x^3 -1=(3x-*)(9x^2-*+1)

Tìm *: 1, x^3 - * + * - * = (*- 2y)^32; (*- 2)(3x + * ) = 9x^2 - 43; 27x^3 - 1 = (3x - *)(9x^2 - * + 1)