x is a number such that x^2+3x+9=0. What is the value of x3?

• roots are -3 and -3
  therefore x3 is
  -27
• 11 years agoHelpfull: Yes(0) No(1)
• 27
  x^2+3x+9=0________(1)
  x^3+3x^2+9x=0
  x^3=-(3x^2+9x)
  =-3(x^2+9x)
  =-3*-9
  =27
• 11 years agoHelpfull: Yes(0) No(2)