4.9t^2+38t-25=0

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Solution for 4.9t^2+38t-25=0 equation:


Simplifying
4.9t2 + 38t + -25 = 0

Reorder the terms:
-25 + 38t + 4.9t2 = 0

Solving
-25 + 38t + 4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '4.9'.
-5.102040816 + 7.755102041t + t2 = 0

Move the constant term to the right:

Add '5.102040816' to each side of the equation.
-5.102040816 + 7.755102041t + 5.102040816 + t2 = 0 + 5.102040816

Reorder the terms:
-5.102040816 + 5.102040816 + 7.755102041t + t2 = 0 + 5.102040816

Combine like terms: -5.102040816 + 5.102040816 = 0.000000000
0.000000000 + 7.755102041t + t2 = 0 + 5.102040816
7.755102041t + t2 = 0 + 5.102040816

Combine like terms: 0 + 5.102040816 = 5.102040816
7.755102041t + t2 = 5.102040816

The t term is 7.755102041t.  Take half its coefficient (3.877551021).
Square it (15.03540192) and add it to both sides.

Add '15.03540192' to each side of the equation.
7.755102041t + 15.03540192 + t2 = 5.102040816 + 15.03540192

Reorder the terms:
15.03540192 + 7.755102041t + t2 = 5.102040816 + 15.03540192

Combine like terms: 5.102040816 + 15.03540192 = 20.137442736
15.03540192 + 7.755102041t + t2 = 20.137442736

Factor a perfect square on the left side:
(t + 3.877551021)(t + 3.877551021) = 20.137442736

Calculate the square root of the right side: 4.48747621

Break this problem into two subproblems by setting 
(t + 3.877551021) equal to 4.48747621 and -4.48747621.

Subproblem 1

t + 3.877551021 = 4.48747621 Simplifying t + 3.877551021 = 4.48747621 Reorder the terms: 3.877551021 + t = 4.48747621 Solving 3.877551021 + t = 4.48747621 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-3.877551021' to each side of the equation. 3.877551021 + -3.877551021 + t = 4.48747621 + -3.877551021 Combine like terms: 3.877551021 + -3.877551021 = 0.000000000 0.000000000 + t = 4.48747621 + -3.877551021 t = 4.48747621 + -3.877551021 Combine like terms: 4.48747621 + -3.877551021 = 0.609925189 t = 0.609925189 Simplifying t = 0.609925189

Subproblem 2

t + 3.877551021 = -4.48747621 Simplifying t + 3.877551021 = -4.48747621 Reorder the terms: 3.877551021 + t = -4.48747621 Solving 3.877551021 + t = -4.48747621 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-3.877551021' to each side of the equation. 3.877551021 + -3.877551021 + t = -4.48747621 + -3.877551021 Combine like terms: 3.877551021 + -3.877551021 = 0.000000000 0.000000000 + t = -4.48747621 + -3.877551021 t = -4.48747621 + -3.877551021 Combine like terms: -4.48747621 + -3.877551021 = -8.365027231 t = -8.365027231 Simplifying t = -8.365027231

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.609925189, -8.365027231}

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