Question 594872
{{{ f( x )=x^5-9x^3 }}}
{{{x^5-9x^3 = 0 }}}
{{{x^3*(x^2 - 9) = 0 }}}
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x^3 = 0
x = 0, 0, 0
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{{{x^2 - 9 = 0}}}
{{{x^2 = 9}}}
x = -3, +3