0=4.9t^2-11t-92

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Solution for 0=4.9t^2-11t-92 equation:


Simplifying
0 = 4.9t2 + -11t + -92

Reorder the terms:
0 = -92 + -11t + 4.9t2

Solving
0 = -92 + -11t + 4.9t2

Solving for variable 't'.

Combine like terms: 0 + 92 = 92
92 + 11t + -4.9t2 = -92 + -11t + 4.9t2 + 92 + 11t + -4.9t2

Reorder the terms:
92 + 11t + -4.9t2 = -92 + 92 + -11t + 11t + 4.9t2 + -4.9t2

Combine like terms: -92 + 92 = 0
92 + 11t + -4.9t2 = 0 + -11t + 11t + 4.9t2 + -4.9t2
92 + 11t + -4.9t2 = -11t + 11t + 4.9t2 + -4.9t2

Combine like terms: -11t + 11t = 0
92 + 11t + -4.9t2 = 0 + 4.9t2 + -4.9t2
92 + 11t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
92 + 11t + -4.9t2 = 0.0

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-18.7755102 + -2.244897959t + t2 = 0

Move the constant term to the right:

Add '18.7755102' to each side of the equation.
-18.7755102 + -2.244897959t + 18.7755102 + t2 = 0 + 18.7755102

Reorder the terms:
-18.7755102 + 18.7755102 + -2.244897959t + t2 = 0 + 18.7755102

Combine like terms: -18.7755102 + 18.7755102 = 0.0000000
0.0000000 + -2.244897959t + t2 = 0 + 18.7755102
-2.244897959t + t2 = 0 + 18.7755102

Combine like terms: 0 + 18.7755102 = 18.7755102
-2.244897959t + t2 = 18.7755102

The t term is -2.244897959t.  Take half its coefficient (-1.12244898).
Square it (1.259891713) and add it to both sides.

Add '1.259891713' to each side of the equation.
-2.244897959t + 1.259891713 + t2 = 18.7755102 + 1.259891713

Reorder the terms:
1.259891713 + -2.244897959t + t2 = 18.7755102 + 1.259891713

Combine like terms: 18.7755102 + 1.259891713 = 20.035401913
1.259891713 + -2.244897959t + t2 = 20.035401913

Factor a perfect square on the left side:
(t + -1.12244898)(t + -1.12244898) = 20.035401913

Calculate the square root of the right side: 4.476092259

Break this problem into two subproblems by setting 
(t + -1.12244898) equal to 4.476092259 and -4.476092259.

Subproblem 1

t + -1.12244898 = 4.476092259 Simplifying t + -1.12244898 = 4.476092259 Reorder the terms: -1.12244898 + t = 4.476092259 Solving -1.12244898 + t = 4.476092259 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.12244898' to each side of the equation. -1.12244898 + 1.12244898 + t = 4.476092259 + 1.12244898 Combine like terms: -1.12244898 + 1.12244898 = 0.00000000 0.00000000 + t = 4.476092259 + 1.12244898 t = 4.476092259 + 1.12244898 Combine like terms: 4.476092259 + 1.12244898 = 5.598541239 t = 5.598541239 Simplifying t = 5.598541239

Subproblem 2

t + -1.12244898 = -4.476092259 Simplifying t + -1.12244898 = -4.476092259 Reorder the terms: -1.12244898 + t = -4.476092259 Solving -1.12244898 + t = -4.476092259 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.12244898' to each side of the equation. -1.12244898 + 1.12244898 + t = -4.476092259 + 1.12244898 Combine like terms: -1.12244898 + 1.12244898 = 0.00000000 0.00000000 + t = -4.476092259 + 1.12244898 t = -4.476092259 + 1.12244898 Combine like terms: -4.476092259 + 1.12244898 = -3.353643279 t = -3.353643279 Simplifying t = -3.353643279

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.598541239, -3.353643279}

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