Question

3у*3+9у*2-у-3=0
Помогите,плиз

Answer 1

Ответ:

3y*3+9y*2-y-3=0

9y+18y-y-3=0

27y-y-3=0

26y-3=0

26y=3

y=3/26

Answer 2

3y³ + 9y² - y - 3 = 0

3y²(y + 3) - (y + 3) = 0

(y + 3)(3y² - 1) = 0

y₁ = -3;        y₂ = √3/3;     y₃ = -√3/3