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4t-5t^2=760
We move all terms to the left:
4t-5t^2-(760)=0
a = -5; b = 4; c = -760;
Δ = b2-4ac
Δ = 42-4·(-5)·(-760)
Δ = -15184
Delta is less than zero, so there is no solution for the equation
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