4.9t^2+23t+5=0

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Solution for 4.9t^2+23t+5=0 equation:


Simplifying
4.9t2 + 23t + 5 = 0

Reorder the terms:
5 + 23t + 4.9t2 = 0

Solving
5 + 23t + 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'.
1.020408163 + 4.693877551t + t2 = 0

Move the constant term to the right:

Add '-1.020408163' to each side of the equation.
1.020408163 + 4.693877551t + -1.020408163 + t2 = 0 + -1.020408163

Reorder the terms:
1.020408163 + -1.020408163 + 4.693877551t + t2 = 0 + -1.020408163

Combine like terms: 1.020408163 + -1.020408163 = 0.000000000
0.000000000 + 4.693877551t + t2 = 0 + -1.020408163
4.693877551t + t2 = 0 + -1.020408163

Combine like terms: 0 + -1.020408163 = -1.020408163
4.693877551t + t2 = -1.020408163

The t term is 4.693877551t.  Take half its coefficient (2.346938776).
Square it (5.508121618) and add it to both sides.

Add '5.508121618' to each side of the equation.
4.693877551t + 5.508121618 + t2 = -1.020408163 + 5.508121618

Reorder the terms:
5.508121618 + 4.693877551t + t2 = -1.020408163 + 5.508121618

Combine like terms: -1.020408163 + 5.508121618 = 4.487713455
5.508121618 + 4.693877551t + t2 = 4.487713455

Factor a perfect square on the left side:
(t + 2.346938776)(t + 2.346938776) = 4.487713455

Calculate the square root of the right side: 2.118422398

Break this problem into two subproblems by setting 
(t + 2.346938776) equal to 2.118422398 and -2.118422398.

Subproblem 1

t + 2.346938776 = 2.118422398 Simplifying t + 2.346938776 = 2.118422398 Reorder the terms: 2.346938776 + t = 2.118422398 Solving 2.346938776 + t = 2.118422398 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.346938776' to each side of the equation. 2.346938776 + -2.346938776 + t = 2.118422398 + -2.346938776 Combine like terms: 2.346938776 + -2.346938776 = 0.000000000 0.000000000 + t = 2.118422398 + -2.346938776 t = 2.118422398 + -2.346938776 Combine like terms: 2.118422398 + -2.346938776 = -0.228516378 t = -0.228516378 Simplifying t = -0.228516378

Subproblem 2

t + 2.346938776 = -2.118422398 Simplifying t + 2.346938776 = -2.118422398 Reorder the terms: 2.346938776 + t = -2.118422398 Solving 2.346938776 + t = -2.118422398 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.346938776' to each side of the equation. 2.346938776 + -2.346938776 + t = -2.118422398 + -2.346938776 Combine like terms: 2.346938776 + -2.346938776 = 0.000000000 0.000000000 + t = -2.118422398 + -2.346938776 t = -2.118422398 + -2.346938776 Combine like terms: -2.118422398 + -2.346938776 = -4.465361174 t = -4.465361174 Simplifying t = -4.465361174

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.228516378, -4.465361174}

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