15z^7-21z^3/3z^3

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Solution for 15z^7-21z^3/3z^3 equation: 


z in (-oo:+oo)

15*z^7-(((21*z^3)/3)*z^3) = 0

15*z^7-7*z^6 = 0

15*z^7-7*z^6 = 0

z^6*(15*z-7) = 0

15*z-7 = 0 // + 7

15*z = 7 // : 15

z = 7/15

z^6 = 0

1*z^6 = 0 // : 1

z^6 = 0

z = 0

z in { 7/15, 0 }

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