15c^9-15c^7+21c^4/3c^4

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Solution for 15c^9-15c^7+21c^4/3c^4 equation: 


c in (-oo:+oo)

15*c^9+((21*c^4)/3)*c^4-(15*c^7) = 0

15*c^9+((21*c^4)/3)*c^4-15*c^7 = 0

15*c^9+7*c^8-15*c^7 = 0

c^7*(15*c^2+7*c-15) = 0

15*c^2+7*c-15 = 0

DELTA = 7^2-(-15*4*15)

DELTA = 949

DELTA > 0

c = (949^(1/2)-7)/(2*15) or c = (-949^(1/2)-7)/(2*15)

c = (949^(1/2)-7)/30 or c = (-(949^(1/2)+7))/30

c^7 = 0

1*c^7 = 0 // : 1

c^7 = 0

c = 0

c in { (-(949^(1/2)+7))/30, (949^(1/2)-7)/30, 0 }

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