5t^2-1.2t-6=0

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Solution for 5t^2-1.2t-6=0 equation:


Simplifying
5t2 + -1.2t + -6 = 0

Reorder the terms:
-6 + -1.2t + 5t2 = 0

Solving
-6 + -1.2t + 5t2 = 0

Solving for variable 't'.

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

Divide each side by '5'.
-1.2 + -0.24t + t2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -0.24t + 1.2 + t2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -0.24t + t2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -0.24t + t2 = 0 + 1.2
-0.24t + t2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-0.24t + t2 = 1.2

The t term is -0.24t.  Take half its coefficient (-0.12).
Square it (0.0144) and add it to both sides.

Add '0.0144' to each side of the equation.
-0.24t + 0.0144 + t2 = 1.2 + 0.0144

Reorder the terms:
0.0144 + -0.24t + t2 = 1.2 + 0.0144

Combine like terms: 1.2 + 0.0144 = 1.2144
0.0144 + -0.24t + t2 = 1.2144

Factor a perfect square on the left side:
(t + -0.12)(t + -0.12) = 1.2144

Calculate the square root of the right side: 1.101998185

Break this problem into two subproblems by setting 
(t + -0.12) equal to 1.101998185 and -1.101998185.

Subproblem 1

t + -0.12 = 1.101998185 Simplifying t + -0.12 = 1.101998185 Reorder the terms: -0.12 + t = 1.101998185 Solving -0.12 + t = 1.101998185 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.12' to each side of the equation. -0.12 + 0.12 + t = 1.101998185 + 0.12 Combine like terms: -0.12 + 0.12 = 0.00 0.00 + t = 1.101998185 + 0.12 t = 1.101998185 + 0.12 Combine like terms: 1.101998185 + 0.12 = 1.221998185 t = 1.221998185 Simplifying t = 1.221998185

Subproblem 2

t + -0.12 = -1.101998185 Simplifying t + -0.12 = -1.101998185 Reorder the terms: -0.12 + t = -1.101998185 Solving -0.12 + t = -1.101998185 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.12' to each side of the equation. -0.12 + 0.12 + t = -1.101998185 + 0.12 Combine like terms: -0.12 + 0.12 = 0.00 0.00 + t = -1.101998185 + 0.12 t = -1.101998185 + 0.12 Combine like terms: -1.101998185 + 0.12 = -0.981998185 t = -0.981998185 Simplifying t = -0.981998185

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.221998185, -0.981998185}

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