-4.9t^2+27.5t+9.9=0

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Solution for -4.9t^2+27.5t+9.9=0 equation:


Simplifying
-4.9t2 + 27.5t + 9.9 = 0

Reorder the terms:
9.9 + 27.5t + -4.9t2 = 0

Solving
9.9 + 27.5t + -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'.
-2.020408163 + -5.612244898t + t2 = 0

Move the constant term to the right:

Add '2.020408163' to each side of the equation.
-2.020408163 + -5.612244898t + 2.020408163 + t2 = 0 + 2.020408163

Reorder the terms:
-2.020408163 + 2.020408163 + -5.612244898t + t2 = 0 + 2.020408163

Combine like terms: -2.020408163 + 2.020408163 = 0.000000000
0.000000000 + -5.612244898t + t2 = 0 + 2.020408163
-5.612244898t + t2 = 0 + 2.020408163

Combine like terms: 0 + 2.020408163 = 2.020408163
-5.612244898t + t2 = 2.020408163

The t term is -5.612244898t.  Take half its coefficient (-2.806122449).
Square it (7.874323199) and add it to both sides.

Add '7.874323199' to each side of the equation.
-5.612244898t + 7.874323199 + t2 = 2.020408163 + 7.874323199

Reorder the terms:
7.874323199 + -5.612244898t + t2 = 2.020408163 + 7.874323199

Combine like terms: 2.020408163 + 7.874323199 = 9.894731362
7.874323199 + -5.612244898t + t2 = 9.894731362

Factor a perfect square on the left side:
(t + -2.806122449)(t + -2.806122449) = 9.894731362

Calculate the square root of the right side: 3.145589192

Break this problem into two subproblems by setting 
(t + -2.806122449) equal to 3.145589192 and -3.145589192.

Subproblem 1

t + -2.806122449 = 3.145589192 Simplifying t + -2.806122449 = 3.145589192 Reorder the terms: -2.806122449 + t = 3.145589192 Solving -2.806122449 + t = 3.145589192 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.806122449' to each side of the equation. -2.806122449 + 2.806122449 + t = 3.145589192 + 2.806122449 Combine like terms: -2.806122449 + 2.806122449 = 0.000000000 0.000000000 + t = 3.145589192 + 2.806122449 t = 3.145589192 + 2.806122449 Combine like terms: 3.145589192 + 2.806122449 = 5.951711641 t = 5.951711641 Simplifying t = 5.951711641

Subproblem 2

t + -2.806122449 = -3.145589192 Simplifying t + -2.806122449 = -3.145589192 Reorder the terms: -2.806122449 + t = -3.145589192 Solving -2.806122449 + t = -3.145589192 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.806122449' to each side of the equation. -2.806122449 + 2.806122449 + t = -3.145589192 + 2.806122449 Combine like terms: -2.806122449 + 2.806122449 = 0.000000000 0.000000000 + t = -3.145589192 + 2.806122449 t = -3.145589192 + 2.806122449 Combine like terms: -3.145589192 + 2.806122449 = -0.339466743 t = -0.339466743 Simplifying t = -0.339466743

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.951711641, -0.339466743}

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