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0=-5t^2-4t-120
We move all terms to the left:
0-(-5t^2-4t-120)=0
We add all the numbers together, and all the variables
-(-5t^2-4t-120)=0
We get rid of parentheses
5t^2+4t+120=0
a = 5; b = 4; c = +120;
Δ = b2-4ac
Δ = 42-4·5·120
Δ = -2384
Delta is less than zero, so there is no solution for the equation
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