5t^2-25t-2=0

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Solution for 5t^2-25t-2=0 equation:


Simplifying
5t2 + -25t + -2 = 0

Reorder the terms:
-2 + -25t + 5t2 = 0

Solving
-2 + -25t + 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'.
-0.4 + -5t + t2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -5t + 0.4 + t2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -5t + t2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -5t + t2 = 0 + 0.4
-5t + t2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-5t + t2 = 0.4

The t term is -5t.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5t + 6.25 + t2 = 0.4 + 6.25

Reorder the terms:
6.25 + -5t + t2 = 0.4 + 6.25

Combine like terms: 0.4 + 6.25 = 6.65
6.25 + -5t + t2 = 6.65

Factor a perfect square on the left side:
(t + -2.5)(t + -2.5) = 6.65

Calculate the square root of the right side: 2.578759392

Break this problem into two subproblems by setting 
(t + -2.5) equal to 2.578759392 and -2.578759392.

Subproblem 1

t + -2.5 = 2.578759392 Simplifying t + -2.5 = 2.578759392 Reorder the terms: -2.5 + t = 2.578759392 Solving -2.5 + t = 2.578759392 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + t = 2.578759392 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = 2.578759392 + 2.5 t = 2.578759392 + 2.5 Combine like terms: 2.578759392 + 2.5 = 5.078759392 t = 5.078759392 Simplifying t = 5.078759392

Subproblem 2

t + -2.5 = -2.578759392 Simplifying t + -2.5 = -2.578759392 Reorder the terms: -2.5 + t = -2.578759392 Solving -2.5 + t = -2.578759392 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + t = -2.578759392 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + t = -2.578759392 + 2.5 t = -2.578759392 + 2.5 Combine like terms: -2.578759392 + 2.5 = -0.078759392 t = -0.078759392 Simplifying t = -0.078759392

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.078759392, -0.078759392}

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