4.905t^2+10t+20=0

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Solution for 4.905t^2+10t+20=0 equation:


Simplifying
4.905t2 + 10t + 20 = 0

Reorder the terms:
20 + 10t + 4.905t2 = 0

Solving
20 + 10t + 4.905t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
4.905 the coefficient of the squared term: 

Divide each side by '4.905'.
4.077471967 + 2.038735984t + t2 = 0

Move the constant term to the right:

Add '-4.077471967' to each side of the equation.
4.077471967 + 2.038735984t + -4.077471967 + t2 = 0 + -4.077471967

Reorder the terms:
4.077471967 + -4.077471967 + 2.038735984t + t2 = 0 + -4.077471967

Combine like terms: 4.077471967 + -4.077471967 = 0.000000000
0.000000000 + 2.038735984t + t2 = 0 + -4.077471967
2.038735984t + t2 = 0 + -4.077471967

Combine like terms: 0 + -4.077471967 = -4.077471967
2.038735984t + t2 = -4.077471967

The t term is 2.038735984t.  Take half its coefficient (1.019367992).
Square it (1.039111103) and add it to both sides.

Add '1.039111103' to each side of the equation.
2.038735984t + 1.039111103 + t2 = -4.077471967 + 1.039111103

Reorder the terms:
1.039111103 + 2.038735984t + t2 = -4.077471967 + 1.039111103

Combine like terms: -4.077471967 + 1.039111103 = -3.038360864
1.039111103 + 2.038735984t + t2 = -3.038360864

Factor a perfect square on the left side:
(t + 1.019367992)(t + 1.019367992) = -3.038360864

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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