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0=-16t^2+11.2t-7
We move all terms to the left:
0-(-16t^2+11.2t-7)=0
We add all the numbers together, and all the variables
-(-16t^2+11.2t-7)=0
We get rid of parentheses
16t^2-11.2t+7=0
a = 16; b = -11.2; c = +7;
Δ = b2-4ac
Δ = -11.22-4·16·7
Δ = -322.56
Delta is less than zero, so there is no solution for the equation
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