4.905t^2-7t+0.65=0

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Solution for 4.905t^2-7t+0.65=0 equation:


Simplifying
4.905t2 + -7t + 0.65 = 0

Reorder the terms:
0.65 + -7t + 4.905t2 = 0

Solving
0.65 + -7t + 4.905t2 = 0

Solving for variable 't'.

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

Divide each side by '4.905'.
0.1325178389 + -1.427115189t + t2 = 0

Move the constant term to the right:

Add '-0.1325178389' to each side of the equation.
0.1325178389 + -1.427115189t + -0.1325178389 + t2 = 0 + -0.1325178389

Reorder the terms:
0.1325178389 + -0.1325178389 + -1.427115189t + t2 = 0 + -0.1325178389

Combine like terms: 0.1325178389 + -0.1325178389 = 0.0000000000
0.0000000000 + -1.427115189t + t2 = 0 + -0.1325178389
-1.427115189t + t2 = 0 + -0.1325178389

Combine like terms: 0 + -0.1325178389 = -0.1325178389
-1.427115189t + t2 = -0.1325178389

The t term is -1.427115189t.  Take half its coefficient (-0.7135575945).
Square it (0.5091644407) and add it to both sides.

Add '0.5091644407' to each side of the equation.
-1.427115189t + 0.5091644407 + t2 = -0.1325178389 + 0.5091644407

Reorder the terms:
0.5091644407 + -1.427115189t + t2 = -0.1325178389 + 0.5091644407

Combine like terms: -0.1325178389 + 0.5091644407 = 0.3766466018
0.5091644407 + -1.427115189t + t2 = 0.3766466018

Factor a perfect square on the left side:
(t + -0.7135575945)(t + -0.7135575945) = 0.3766466018

Calculate the square root of the right side: 0.613715408

Break this problem into two subproblems by setting 
(t + -0.7135575945) equal to 0.613715408 and -0.613715408.

Subproblem 1

t + -0.7135575945 = 0.613715408 Simplifying t + -0.7135575945 = 0.613715408 Reorder the terms: -0.7135575945 + t = 0.613715408 Solving -0.7135575945 + t = 0.613715408 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7135575945' to each side of the equation. -0.7135575945 + 0.7135575945 + t = 0.613715408 + 0.7135575945 Combine like terms: -0.7135575945 + 0.7135575945 = 0.0000000000 0.0000000000 + t = 0.613715408 + 0.7135575945 t = 0.613715408 + 0.7135575945 Combine like terms: 0.613715408 + 0.7135575945 = 1.3272730025 t = 1.3272730025 Simplifying t = 1.3272730025

Subproblem 2

t + -0.7135575945 = -0.613715408 Simplifying t + -0.7135575945 = -0.613715408 Reorder the terms: -0.7135575945 + t = -0.613715408 Solving -0.7135575945 + t = -0.613715408 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7135575945' to each side of the equation. -0.7135575945 + 0.7135575945 + t = -0.613715408 + 0.7135575945 Combine like terms: -0.7135575945 + 0.7135575945 = 0.0000000000 0.0000000000 + t = -0.613715408 + 0.7135575945 t = -0.613715408 + 0.7135575945 Combine like terms: -0.613715408 + 0.7135575945 = 0.0998421865 t = 0.0998421865 Simplifying t = 0.0998421865

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.3272730025, 0.0998421865}

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