5x^2+14.1x+5=0

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Solution for 5x^2+14.1x+5=0 equation:


Simplifying
5x2 + 14.1x + 5 = 0

Reorder the terms:
5 + 14.1x + 5x2 = 0

Solving
5 + 14.1x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
1 + 2.82x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 2.82x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + 2.82x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 2.82x + x2 = 0 + -1
2.82x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
2.82x + x2 = -1

The x term is 2.82x.  Take half its coefficient (1.41).
Square it (1.9881) and add it to both sides.

Add '1.9881' to each side of the equation.
2.82x + 1.9881 + x2 = -1 + 1.9881

Reorder the terms:
1.9881 + 2.82x + x2 = -1 + 1.9881

Combine like terms: -1 + 1.9881 = 0.9881
1.9881 + 2.82x + x2 = 0.9881

Factor a perfect square on the left side:
(x + 1.41)(x + 1.41) = 0.9881

Calculate the square root of the right side: 0.994032193

Break this problem into two subproblems by setting 
(x + 1.41) equal to 0.994032193 and -0.994032193.

Subproblem 1

x + 1.41 = 0.994032193 Simplifying x + 1.41 = 0.994032193 Reorder the terms: 1.41 + x = 0.994032193 Solving 1.41 + x = 0.994032193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.41' to each side of the equation. 1.41 + -1.41 + x = 0.994032193 + -1.41 Combine like terms: 1.41 + -1.41 = 0.00 0.00 + x = 0.994032193 + -1.41 x = 0.994032193 + -1.41 Combine like terms: 0.994032193 + -1.41 = -0.415967807 x = -0.415967807 Simplifying x = -0.415967807

Subproblem 2

x + 1.41 = -0.994032193 Simplifying x + 1.41 = -0.994032193 Reorder the terms: 1.41 + x = -0.994032193 Solving 1.41 + x = -0.994032193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.41' to each side of the equation. 1.41 + -1.41 + x = -0.994032193 + -1.41 Combine like terms: 1.41 + -1.41 = 0.00 0.00 + x = -0.994032193 + -1.41 x = -0.994032193 + -1.41 Combine like terms: -0.994032193 + -1.41 = -2.404032193 x = -2.404032193 Simplifying x = -2.404032193

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.415967807, -2.404032193}

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