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-.4t^2+24t-360=0
We add all the numbers together, and all the variables
-0.4t^2+24t-360=0
a = -0.4; b = 24; c = -360;
Δ = b2-4ac
Δ = 242-4·(-0.4)·(-360)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$t=\frac{-b}{2a}=\frac{-24}{-0.8}=+30$
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