-4.9t^2+12.25t-6.664=0

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Solution for -4.9t^2+12.25t-6.664=0 equation:


Simplifying
-4.9t2 + 12.25t + -6.664 = 0

Reorder the terms:
-6.664 + 12.25t + -4.9t2 = 0

Solving
-6.664 + 12.25t + -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'.
1.36 + -2.5t + t2 = 0

Move the constant term to the right:

Add '-1.36' to each side of the equation.
1.36 + -2.5t + -1.36 + t2 = 0 + -1.36

Reorder the terms:
1.36 + -1.36 + -2.5t + t2 = 0 + -1.36

Combine like terms: 1.36 + -1.36 = 0.00
0.00 + -2.5t + t2 = 0 + -1.36
-2.5t + t2 = 0 + -1.36

Combine like terms: 0 + -1.36 = -1.36
-2.5t + t2 = -1.36

The t term is -2.5t.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5t + 1.5625 + t2 = -1.36 + 1.5625

Reorder the terms:
1.5625 + -2.5t + t2 = -1.36 + 1.5625

Combine like terms: -1.36 + 1.5625 = 0.2025
1.5625 + -2.5t + t2 = 0.2025

Factor a perfect square on the left side:
(t + -1.25)(t + -1.25) = 0.2025

Calculate the square root of the right side: 0.45

Break this problem into two subproblems by setting 
(t + -1.25) equal to 0.45 and -0.45.

Subproblem 1

t + -1.25 = 0.45 Simplifying t + -1.25 = 0.45 Reorder the terms: -1.25 + t = 0.45 Solving -1.25 + t = 0.45 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = 0.45 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = 0.45 + 1.25 t = 0.45 + 1.25 Combine like terms: 0.45 + 1.25 = 1.7 t = 1.7 Simplifying t = 1.7

Subproblem 2

t + -1.25 = -0.45 Simplifying t + -1.25 = -0.45 Reorder the terms: -1.25 + t = -0.45 Solving -1.25 + t = -0.45 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = -0.45 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = -0.45 + 1.25 t = -0.45 + 1.25 Combine like terms: -0.45 + 1.25 = 0.8 t = 0.8 Simplifying t = 0.8

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.7, 0.8}

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