Question

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

Answer 1

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