45=-4.905t^2

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Solution for 45=-4.905t^2 equation: 



45=-4.905t^2

We move all terms to the left:

45-(-4.905t^2)=0

We get rid of parentheses

4.905t^2+45=0

a = 4.905; b = 0; c = +45;
Δ = b2-4ac
Δ = 02-4·4.905·45
Δ = -882.9
Delta is less than zero, so there is no solution for the equation

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