2t^2-2t=55

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Solution for 2t^2-2t=55 equation:


Simplifying
2t2 + -2t = 55

Reorder the terms:
-2t + 2t2 = 55

Solving
-2t + 2t2 = 55

Solving for variable 't'.

Reorder the terms:
-55 + -2t + 2t2 = 55 + -55

Combine like terms: 55 + -55 = 0
-55 + -2t + 2t2 = 0

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

Divide each side by '2'.
-27.5 + -1t + t2 = 0

Move the constant term to the right:

Add '27.5' to each side of the equation.
-27.5 + -1t + 27.5 + t2 = 0 + 27.5

Reorder the terms:
-27.5 + 27.5 + -1t + t2 = 0 + 27.5

Combine like terms: -27.5 + 27.5 = 0.0
0.0 + -1t + t2 = 0 + 27.5
-1t + t2 = 0 + 27.5

Combine like terms: 0 + 27.5 = 27.5
-1t + t2 = 27.5

The t term is -1t.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1t + 0.25 + t2 = 27.5 + 0.25

Reorder the terms:
0.25 + -1t + t2 = 27.5 + 0.25

Combine like terms: 27.5 + 0.25 = 27.75
0.25 + -1t + t2 = 27.75

Factor a perfect square on the left side:
(t + -0.5)(t + -0.5) = 27.75

Calculate the square root of the right side: 5.267826876

Break this problem into two subproblems by setting 
(t + -0.5) equal to 5.267826876 and -5.267826876.

Subproblem 1

t + -0.5 = 5.267826876 Simplifying t + -0.5 = 5.267826876 Reorder the terms: -0.5 + t = 5.267826876 Solving -0.5 + t = 5.267826876 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + t = 5.267826876 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = 5.267826876 + 0.5 t = 5.267826876 + 0.5 Combine like terms: 5.267826876 + 0.5 = 5.767826876 t = 5.767826876 Simplifying t = 5.767826876

Subproblem 2

t + -0.5 = -5.267826876 Simplifying t + -0.5 = -5.267826876 Reorder the terms: -0.5 + t = -5.267826876 Solving -0.5 + t = -5.267826876 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + t = -5.267826876 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = -5.267826876 + 0.5 t = -5.267826876 + 0.5 Combine like terms: -5.267826876 + 0.5 = -4.767826876 t = -4.767826876 Simplifying t = -4.767826876

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.767826876, -4.767826876}

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