t^2-t=66

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Solution for t^2-t=66 equation:


Simplifying
t2 + -1t = 66

Reorder the terms:
-1t + t2 = 66

Solving
-1t + t2 = 66

Solving for variable 't'.

Reorder the terms:
-66 + -1t + t2 = 66 + -66

Combine like terms: 66 + -66 = 0
-66 + -1t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '66' to each side of the equation.
-66 + -1t + 66 + t2 = 0 + 66

Reorder the terms:
-66 + 66 + -1t + t2 = 0 + 66

Combine like terms: -66 + 66 = 0
0 + -1t + t2 = 0 + 66
-1t + t2 = 0 + 66

Combine like terms: 0 + 66 = 66
-1t + t2 = 66

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 = 66 + 0.25

Reorder the terms:
0.25 + -1t + t2 = 66 + 0.25

Combine like terms: 66 + 0.25 = 66.25
0.25 + -1t + t2 = 66.25

Factor a perfect square on the left side:
(t + -0.5)(t + -0.5) = 66.25

Calculate the square root of the right side: 8.139410298

Break this problem into two subproblems by setting 
(t + -0.5) equal to 8.139410298 and -8.139410298.

Subproblem 1

t + -0.5 = 8.139410298 Simplifying t + -0.5 = 8.139410298 Reorder the terms: -0.5 + t = 8.139410298 Solving -0.5 + t = 8.139410298 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 = 8.139410298 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = 8.139410298 + 0.5 t = 8.139410298 + 0.5 Combine like terms: 8.139410298 + 0.5 = 8.639410298 t = 8.639410298 Simplifying t = 8.639410298

Subproblem 2

t + -0.5 = -8.139410298 Simplifying t + -0.5 = -8.139410298 Reorder the terms: -0.5 + t = -8.139410298 Solving -0.5 + t = -8.139410298 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 = -8.139410298 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = -8.139410298 + 0.5 t = -8.139410298 + 0.5 Combine like terms: -8.139410298 + 0.5 = -7.639410298 t = -7.639410298 Simplifying t = -7.639410298

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.639410298, -7.639410298}

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