-4.9t^2+92t-141=0

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Solution for -4.9t^2+92t-141=0 equation:


Simplifying
-4.9t2 + 92t + -141 = 0

Reorder the terms:
-141 + 92t + -4.9t2 = 0

Solving
-141 + 92t + -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'.
28.7755102 + -18.7755102t + t2 = 0

Move the constant term to the right:

Add '-28.7755102' to each side of the equation.
28.7755102 + -18.7755102t + -28.7755102 + t2 = 0 + -28.7755102

Reorder the terms:
28.7755102 + -28.7755102 + -18.7755102t + t2 = 0 + -28.7755102

Combine like terms: 28.7755102 + -28.7755102 = 0.0000000
0.0000000 + -18.7755102t + t2 = 0 + -28.7755102
-18.7755102t + t2 = 0 + -28.7755102

Combine like terms: 0 + -28.7755102 = -28.7755102
-18.7755102t + t2 = -28.7755102

The t term is -18.7755102t.  Take half its coefficient (-9.3877551).
Square it (88.12994582) and add it to both sides.

Add '88.12994582' to each side of the equation.
-18.7755102t + 88.12994582 + t2 = -28.7755102 + 88.12994582

Reorder the terms:
88.12994582 + -18.7755102t + t2 = -28.7755102 + 88.12994582

Combine like terms: -28.7755102 + 88.12994582 = 59.35443562
88.12994582 + -18.7755102t + t2 = 59.35443562

Factor a perfect square on the left side:
(t + -9.3877551)(t + -9.3877551) = 59.35443562

Calculate the square root of the right side: 7.704182995

Break this problem into two subproblems by setting 
(t + -9.3877551) equal to 7.704182995 and -7.704182995.

Subproblem 1

t + -9.3877551 = 7.704182995 Simplifying t + -9.3877551 = 7.704182995 Reorder the terms: -9.3877551 + t = 7.704182995 Solving -9.3877551 + t = 7.704182995 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '9.3877551' to each side of the equation. -9.3877551 + 9.3877551 + t = 7.704182995 + 9.3877551 Combine like terms: -9.3877551 + 9.3877551 = 0.0000000 0.0000000 + t = 7.704182995 + 9.3877551 t = 7.704182995 + 9.3877551 Combine like terms: 7.704182995 + 9.3877551 = 17.091938095 t = 17.091938095 Simplifying t = 17.091938095

Subproblem 2

t + -9.3877551 = -7.704182995 Simplifying t + -9.3877551 = -7.704182995 Reorder the terms: -9.3877551 + t = -7.704182995 Solving -9.3877551 + t = -7.704182995 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '9.3877551' to each side of the equation. -9.3877551 + 9.3877551 + t = -7.704182995 + 9.3877551 Combine like terms: -9.3877551 + 9.3877551 = 0.0000000 0.0000000 + t = -7.704182995 + 9.3877551 t = -7.704182995 + 9.3877551 Combine like terms: -7.704182995 + 9.3877551 = 1.683572105 t = 1.683572105 Simplifying t = 1.683572105

Solution

The solution to the problem is based on the solutions from the subproblems. t = {17.091938095, 1.683572105}

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