90=-16t^2+.10

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Solution for 90=-16t^2+.10 equation: 



90=-16t^2+.10

We move all terms to the left:

90-(-16t^2+.10)=0

We get rid of parentheses

16t^2-.10+90=0

We add all the numbers together, and all the variables

16t^2+89.9=0

a = 16; b = 0; c = +89.9;
Δ = b2-4ac
Δ = 02-4·16·89.9
Δ = -5753.6
Delta is less than zero, so there is no solution for the equation

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