10x^2+14x+1=0

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Solution for 10x^2+14x+1=0 equation:


Simplifying
10x2 + 14x + 1 = 0

Reorder the terms:
1 + 14x + 10x2 = 0

Solving
1 + 14x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
0.1 + 1.4x + x2 = 0

Move the constant term to the right:

Add '-0.1' to each side of the equation.
0.1 + 1.4x + -0.1 + x2 = 0 + -0.1

Reorder the terms:
0.1 + -0.1 + 1.4x + x2 = 0 + -0.1

Combine like terms: 0.1 + -0.1 = 0.0
0.0 + 1.4x + x2 = 0 + -0.1
1.4x + x2 = 0 + -0.1

Combine like terms: 0 + -0.1 = -0.1
1.4x + x2 = -0.1

The x term is 1.4x.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4x + 0.49 + x2 = -0.1 + 0.49

Reorder the terms:
0.49 + 1.4x + x2 = -0.1 + 0.49

Combine like terms: -0.1 + 0.49 = 0.39
0.49 + 1.4x + x2 = 0.39

Factor a perfect square on the left side:
(x + 0.7)(x + 0.7) = 0.39

Calculate the square root of the right side: 0.6244998

Break this problem into two subproblems by setting 
(x + 0.7) equal to 0.6244998 and -0.6244998.

Subproblem 1

x + 0.7 = 0.6244998 Simplifying x + 0.7 = 0.6244998 Reorder the terms: 0.7 + x = 0.6244998 Solving 0.7 + x = 0.6244998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = 0.6244998 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = 0.6244998 + -0.7 x = 0.6244998 + -0.7 Combine like terms: 0.6244998 + -0.7 = -0.0755002 x = -0.0755002 Simplifying x = -0.0755002

Subproblem 2

x + 0.7 = -0.6244998 Simplifying x + 0.7 = -0.6244998 Reorder the terms: 0.7 + x = -0.6244998 Solving 0.7 + x = -0.6244998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = -0.6244998 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = -0.6244998 + -0.7 x = -0.6244998 + -0.7 Combine like terms: -0.6244998 + -0.7 = -1.3244998 x = -1.3244998 Simplifying x = -1.3244998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.0755002, -1.3244998}

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