Question

решите уравнение (х-2) (х^2+2х+1) = 4 (х+1)

Answer 1

(x-2)(x²+2x+1)=4(x+1)
(x-2)(x+1)²=4(x+1)
(x-2)(x+1)=4
x²-x-2=4
x²-x-6=0
D=1+24=25
x(1)=(1+5)/2=3
x(2)=-2/2=-1