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12=5.452t-4.9t^2
We move all terms to the left:
12-(5.452t-4.9t^2)=0
We get rid of parentheses
4.9t^2-5.452t+12=0
a = 4.9; b = -5.452; c = +12;
Δ = b2-4ac
Δ = -5.4522-4·4.9·12
Δ = -205.475696
Delta is less than zero, so there is no solution for the equation
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