61=10t-4.9t^2

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Solution for 61=10t-4.9t^2 equation:


Simplifying
61 = 10t + -4.9t2

Solving
61 = 10t + -4.9t2

Solving for variable 't'.

Reorder the terms:
61 + -10t + 4.9t2 = 10t + -10t + -4.9t2 + 4.9t2

Combine like terms: 10t + -10t = 0
61 + -10t + 4.9t2 = 0 + -4.9t2 + 4.9t2
61 + -10t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
61 + -10t + 4.9t2 = 0.0

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

Divide each side by '4.9'.
12.44897959 + -2.040816327t + t2 = 0

Move the constant term to the right:

Add '-12.44897959' to each side of the equation.
12.44897959 + -2.040816327t + -12.44897959 + t2 = 0 + -12.44897959

Reorder the terms:
12.44897959 + -12.44897959 + -2.040816327t + t2 = 0 + -12.44897959

Combine like terms: 12.44897959 + -12.44897959 = 0.00000000
0.00000000 + -2.040816327t + t2 = 0 + -12.44897959
-2.040816327t + t2 = 0 + -12.44897959

Combine like terms: 0 + -12.44897959 = -12.44897959
-2.040816327t + t2 = -12.44897959

The t term is -2.040816327t.  Take half its coefficient (-1.020408164).
Square it (1.041232821) and add it to both sides.

Add '1.041232821' to each side of the equation.
-2.040816327t + 1.041232821 + t2 = -12.44897959 + 1.041232821

Reorder the terms:
1.041232821 + -2.040816327t + t2 = -12.44897959 + 1.041232821

Combine like terms: -12.44897959 + 1.041232821 = -11.407746769
1.041232821 + -2.040816327t + t2 = -11.407746769

Factor a perfect square on the left side:
(t + -1.020408164)(t + -1.020408164) = -11.407746769

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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