По т. Виета х₁*х₂ = -2 и х₁ + х₂ = -4
Возьмём 2-е равенство:
<span>х₁ + х₂ = - 4|</span>³
х₁³ + 3х₁² *х₂ + 3х₁ * х₂² + х₂³= -64
х₁³ + х₂³ + 3х₁х₂(х₁ + х₂) = -64
х₁³ + х₂³ + 3*(-2) * (-4) = -64
х₁³ + х₂³ +24 = -64
х₁³ + х₂³ = -64 -24
х₁³ + х₂³ = -88
15-6x = 1+14-6x
15-6x = 15-6x
х - любое число
не путать с "корней нет"
тут они есть, их бесконечно много
This summer I spent with my grandmother. We had fun, and not only rested well and worked, helped my beloved grandmother. We went to the river, there were a lot of people and I met a company of boys. We still communicate despite the distance. When I arrived home to my parents, I saw that my parents decided to surprise me by putting a huge pool that was the best summer of my life
7√28 - √80 - 2√63 + 3√45 = 7√7 * √ 4 - √16* √5 -2√7 *√9 + 3√5 * √9 =
14√7-4√5-6√7+9√5 = 8√7 + 5√5 (вроде так)