15z^4-21z^3/3z^2

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Solution for 15z^4-21z^3/3z^2 equation: 


z in (-oo:+oo)

15*z^4-(z^2*((21*z^3)/3)) = 0

15*z^4-7*z^5 = 0

15*z^4-7*z^5 = 0

z^4*(15-7*z) = 0

15-7*z = 0 // - 15

-7*z = -15 // : -7

z = -15/(-7)

z = 15/7

z^4 = 0

1*z^4 = 0 // : 1

z^4 = 0

z = 0

z in { 15/7, 0 }

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