Решите уравнение (х+2)³-х(3х+1)²+(2х+1)(4х²-2х+1)=42

Question

Решите уравнение (х+2)³-х(3х+1)²+(2х+1)(4х²-2х+1)=42

Answer 1

X^3+8+12x+6x^2-9x^3-x-6x^2+8x^3+1=42
11x=42-9
11x=33
x=3