angrynoodle angrynoodle
  • 09-02-2019
  • Mathematics
contestada

What are the real or imaginary solutions of the polynomial x^3=9x​

What are the real or imaginary solutions of the polynomial x39x class=

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MrBillDoesMath MrBillDoesMath
  • 09-02-2019

Hello from MrBillDoesMath!

Answer:

 x = 0, +\-3


Discussion:

x^3 = 9x              => subtract 9x from both sides

x^3 - 9x = 0         => factor x from both terms

x(x^2-9) = 0        => x = 0 or x^2 - 9 = 0

x = 0, +\-3

Thank you,

MrB

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