215=(1/2)9.8t^2

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Solution for 215=(1/2)9.8t^2 equation: 


t in (-oo:+oo)

215 = (1/2)^9.8*t^2 // - (1/2)^9.8*t^2

215-((1/2)^9.8*t^2) = 0

-(1/2)^9.8*t^2 = -215 // : -(1/2)^9.8

t^2 = 215/((1/2)^9.8)

t^2 = 215/((1/2)^9.8) // ^ 1/2

abs(t) = (215^(1/2))/((1/2)^4.9)

t = (215^(1/2))/((1/2)^4.9) or t = -((215^(1/2))/((1/2)^4.9))

t in { (215^(1/2))/((1/2)^4.9), -((215^(1/2))/((1/2)^4.9)) }

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