Question

решите уравнения

    x^4+2x^3-11x^2+4x+4=0

 

 

Answer 1

x^4+2x^3-11x^2+4x+4=0
(x-2)*(x-1)*(x^2+5x+2)=0

 

x-2=0
x=2

x-1=0
x=1

x^2+5x+2=0

D=5^2-4*1*2=25-8=17

x1=V17/2-2.5
x2=-V17/2-2.5