10x^2+12x-1=0

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Solution for 10x^2+12x-1=0 equation:


Simplifying
10x2 + 12x + -1 = 0

Reorder the terms:
-1 + 12x + 10x2 = 0

Solving
-1 + 12x + 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 + 1.2x + x2 = 0

Move the constant term to the right:

Add '0.1' to each side of the equation.
-0.1 + 1.2x + 0.1 + x2 = 0 + 0.1

Reorder the terms:
-0.1 + 0.1 + 1.2x + x2 = 0 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + 1.2x + x2 = 0 + 0.1
1.2x + x2 = 0 + 0.1

Combine like terms: 0 + 0.1 = 0.1
1.2x + x2 = 0.1

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = 0.1 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = 0.1 + 0.36

Combine like terms: 0.1 + 0.36 = 0.46
0.36 + 1.2x + x2 = 0.46

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 0.46

Calculate the square root of the right side: 0.678232998

Break this problem into two subproblems by setting 
(x + 0.6) equal to 0.678232998 and -0.678232998.

Subproblem 1

x + 0.6 = 0.678232998 Simplifying x + 0.6 = 0.678232998 Reorder the terms: 0.6 + x = 0.678232998 Solving 0.6 + x = 0.678232998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 0.678232998 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 0.678232998 + -0.6 x = 0.678232998 + -0.6 Combine like terms: 0.678232998 + -0.6 = 0.078232998 x = 0.078232998 Simplifying x = 0.078232998

Subproblem 2

x + 0.6 = -0.678232998 Simplifying x + 0.6 = -0.678232998 Reorder the terms: 0.6 + x = -0.678232998 Solving 0.6 + x = -0.678232998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -0.678232998 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -0.678232998 + -0.6 x = -0.678232998 + -0.6 Combine like terms: -0.678232998 + -0.6 = -1.278232998 x = -1.278232998 Simplifying x = -1.278232998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.078232998, -1.278232998}

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