4.9t^2+1.28t-0.26=0

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Solution for 4.9t^2+1.28t-0.26=0 equation:


Simplifying
4.9t2 + 1.28t + -0.26 = 0

Reorder the terms:
-0.26 + 1.28t + 4.9t2 = 0

Solving
-0.26 + 1.28t + 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'.
-0.05306122449 + 0.2612244898t + t2 = 0

Move the constant term to the right:

Add '0.05306122449' to each side of the equation.
-0.05306122449 + 0.2612244898t + 0.05306122449 + t2 = 0 + 0.05306122449

Reorder the terms:
-0.05306122449 + 0.05306122449 + 0.2612244898t + t2 = 0 + 0.05306122449

Combine like terms: -0.05306122449 + 0.05306122449 = 0.00000000000
0.00000000000 + 0.2612244898t + t2 = 0 + 0.05306122449
0.2612244898t + t2 = 0 + 0.05306122449

Combine like terms: 0 + 0.05306122449 = 0.05306122449
0.2612244898t + t2 = 0.05306122449

The t term is 0.2612244898t.  Take half its coefficient (0.1306122449).
Square it (0.01705955852) and add it to both sides.

Add '0.01705955852' to each side of the equation.
0.2612244898t + 0.01705955852 + t2 = 0.05306122449 + 0.01705955852

Reorder the terms:
0.01705955852 + 0.2612244898t + t2 = 0.05306122449 + 0.01705955852

Combine like terms: 0.05306122449 + 0.01705955852 = 0.07012078301
0.01705955852 + 0.2612244898t + t2 = 0.07012078301

Factor a perfect square on the left side:
(t + 0.1306122449)(t + 0.1306122449) = 0.07012078301

Calculate the square root of the right side: 0.264803291

Break this problem into two subproblems by setting 
(t + 0.1306122449) equal to 0.264803291 and -0.264803291.

Subproblem 1

t + 0.1306122449 = 0.264803291 Simplifying t + 0.1306122449 = 0.264803291 Reorder the terms: 0.1306122449 + t = 0.264803291 Solving 0.1306122449 + t = 0.264803291 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1306122449' to each side of the equation. 0.1306122449 + -0.1306122449 + t = 0.264803291 + -0.1306122449 Combine like terms: 0.1306122449 + -0.1306122449 = 0.0000000000 0.0000000000 + t = 0.264803291 + -0.1306122449 t = 0.264803291 + -0.1306122449 Combine like terms: 0.264803291 + -0.1306122449 = 0.1341910461 t = 0.1341910461 Simplifying t = 0.1341910461

Subproblem 2

t + 0.1306122449 = -0.264803291 Simplifying t + 0.1306122449 = -0.264803291 Reorder the terms: 0.1306122449 + t = -0.264803291 Solving 0.1306122449 + t = -0.264803291 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1306122449' to each side of the equation. 0.1306122449 + -0.1306122449 + t = -0.264803291 + -0.1306122449 Combine like terms: 0.1306122449 + -0.1306122449 = 0.0000000000 0.0000000000 + t = -0.264803291 + -0.1306122449 t = -0.264803291 + -0.1306122449 Combine like terms: -0.264803291 + -0.1306122449 = -0.3954155359 t = -0.3954155359 Simplifying t = -0.3954155359

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.1341910461, -0.3954155359}

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