400=-16t^2+18

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Solution for 400=-16t^2+18 equation: 



400=-16t^2+18

We move all terms to the left:

400-(-16t^2+18)=0

We get rid of parentheses

16t^2-18+400=0

We add all the numbers together, and all the variables

16t^2+382=0

a = 16; b = 0; c = +382;
Δ = b2-4ac
Δ = 02-4·16·382
Δ = -24448
Delta is less than zero, so there is no solution for the equation

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