21x^4-9x^3/3x

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Solution for 21x^4-9x^3/3x equation: 


x in (-oo:+oo)

21*x^4-(x*((9*x^3)/3)) = 0

21*x^4-3*x^4 = 0

18*x^4 = 0 // : 18

x^4 = 0

x = 0

x = 0

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