r^9/2-6r^7/2=0

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Solution for r^9/2-6r^7/2=0 equation: 


r in (-oo:+oo)

(r^9)/2-((6*r^7)/2) = 0

(r^9)/2-3*r^7 = 0

1/2*r^9-3*r^7 = 0

r^7*(1/2*r^2-3) = 0

1/2*r^2 = 3 // : 1/2

r^2 = 6

r^2 = 6 // ^ 1/2

abs(r) = 6^(1/2)

r = 6^(1/2) or r = -6^(1/2)

r^7 = 0

1*r^7 = 0 // : 1

r^7 = 0

r = 0

r in { 6^(1/2), -6^(1/2), 0 }

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