5t^2+10t-2=0

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Solution for 5t^2+10t-2=0 equation:


Simplifying
5t2 + 10t + -2 = 0

Reorder the terms:
-2 + 10t + 5t2 = 0

Solving
-2 + 10t + 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 + 2t + t2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + 2t + 0.4 + t2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + 2t + t2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 2t + t2 = 0 + 0.4
2t + t2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
2t + t2 = 0.4

The t term is 2t.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2t + 1 + t2 = 0.4 + 1

Reorder the terms:
1 + 2t + t2 = 0.4 + 1

Combine like terms: 0.4 + 1 = 1.4
1 + 2t + t2 = 1.4

Factor a perfect square on the left side:
(t + 1)(t + 1) = 1.4

Calculate the square root of the right side: 1.183215957

Break this problem into two subproblems by setting 
(t + 1) equal to 1.183215957 and -1.183215957.

Subproblem 1

t + 1 = 1.183215957 Simplifying t + 1 = 1.183215957 Reorder the terms: 1 + t = 1.183215957 Solving 1 + t = 1.183215957 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = 1.183215957 + -1 Combine like terms: 1 + -1 = 0 0 + t = 1.183215957 + -1 t = 1.183215957 + -1 Combine like terms: 1.183215957 + -1 = 0.183215957 t = 0.183215957 Simplifying t = 0.183215957

Subproblem 2

t + 1 = -1.183215957 Simplifying t + 1 = -1.183215957 Reorder the terms: 1 + t = -1.183215957 Solving 1 + t = -1.183215957 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = -1.183215957 + -1 Combine like terms: 1 + -1 = 0 0 + t = -1.183215957 + -1 t = -1.183215957 + -1 Combine like terms: -1.183215957 + -1 = -2.183215957 t = -2.183215957 Simplifying t = -2.183215957

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.183215957, -2.183215957}

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