Question

Решите уравнение :
x(x^2+6x+9)=4(x+3)

Answer 1

x (x + 3)^2 = 4 (x + 3) 
x (x+ 3) (x+ 3) - 4 (x+  3) = 0 
(x + 3) ( x(x + 3) - 4) = 0
(x + 3) ( x^2 + 3x - 4) = 0 
(x + 3) ( x + 4) (x - 1) = 0 
x = - 3 
x = - 4
x = 1