t^2/20+8=15

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Solution for t^2/20+8=15 equation: 


t in (-oo:+oo)

(t^2)/20+8 = 15 // - 15

(t^2)/20-15+8 = 0

1/20*t^2 = 7 // : 1/20

t^2 = 140

t^2 = 140 // ^ 1/2

abs(t) = 2*35^(1/2)

t = 2*35^(1/2) or t = -(2*35^(1/2))

t in { 2*35^(1/2), -(2*35^(1/2)) }

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