5t^2-6=8t

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Solution for 5t^2-6=8t equation:


Simplifying
5t2 + -6 = 8t

Reorder the terms:
-6 + 5t2 = 8t

Solving
-6 + 5t2 = 8t

Solving for variable 't'.

Reorder the terms:
-6 + -8t + 5t2 = 8t + -8t

Combine like terms: 8t + -8t = 0
-6 + -8t + 5t2 = 0

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

Divide each side by '5'.
-1.2 + -1.6t + t2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -1.6t + 1.2 + t2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -1.6t + t2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -1.6t + t2 = 0 + 1.2
-1.6t + t2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-1.6t + t2 = 1.2

The t term is -1.6t.  Take half its coefficient (-0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
-1.6t + 0.64 + t2 = 1.2 + 0.64

Reorder the terms:
0.64 + -1.6t + t2 = 1.2 + 0.64

Combine like terms: 1.2 + 0.64 = 1.84
0.64 + -1.6t + t2 = 1.84

Factor a perfect square on the left side:
(t + -0.8)(t + -0.8) = 1.84

Calculate the square root of the right side: 1.356465997

Break this problem into two subproblems by setting 
(t + -0.8) equal to 1.356465997 and -1.356465997.

Subproblem 1

t + -0.8 = 1.356465997 Simplifying t + -0.8 = 1.356465997 Reorder the terms: -0.8 + t = 1.356465997 Solving -0.8 + t = 1.356465997 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + t = 1.356465997 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + t = 1.356465997 + 0.8 t = 1.356465997 + 0.8 Combine like terms: 1.356465997 + 0.8 = 2.156465997 t = 2.156465997 Simplifying t = 2.156465997

Subproblem 2

t + -0.8 = -1.356465997 Simplifying t + -0.8 = -1.356465997 Reorder the terms: -0.8 + t = -1.356465997 Solving -0.8 + t = -1.356465997 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + t = -1.356465997 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + t = -1.356465997 + 0.8 t = -1.356465997 + 0.8 Combine like terms: -1.356465997 + 0.8 = -0.556465997 t = -0.556465997 Simplifying t = -0.556465997

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.156465997, -0.556465997}

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