66.67x^2+10*x=6

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Solution for 66.67x^2+10*x=6 equation:


Simplifying
66.67x2 + 10x = 6

Reorder the terms:
10x + 66.67x2 = 6

Solving
10x + 66.67x2 = 6

Solving for variable 'x'.

Reorder the terms:
-6 + 10x + 66.67x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + 10x + 66.67x2 = 0

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

Divide each side by '66.67'.
-0.08999550022 + 0.1499925004x + x2 = 0

Move the constant term to the right:

Add '0.08999550022' to each side of the equation.
-0.08999550022 + 0.1499925004x + 0.08999550022 + x2 = 0 + 0.08999550022

Reorder the terms:
-0.08999550022 + 0.08999550022 + 0.1499925004x + x2 = 0 + 0.08999550022

Combine like terms: -0.08999550022 + 0.08999550022 = 0.00000000000
0.00000000000 + 0.1499925004x + x2 = 0 + 0.08999550022
0.1499925004x + x2 = 0 + 0.08999550022

Combine like terms: 0 + 0.08999550022 = 0.08999550022
0.1499925004x + x2 = 0.08999550022

The x term is 0.1499925004x.  Take half its coefficient (0.0749962502).
Square it (0.005624437544) and add it to both sides.

Add '0.005624437544' to each side of the equation.
0.1499925004x + 0.005624437544 + x2 = 0.08999550022 + 0.005624437544

Reorder the terms:
0.005624437544 + 0.1499925004x + x2 = 0.08999550022 + 0.005624437544

Combine like terms: 0.08999550022 + 0.005624437544 = 0.095619937764
0.005624437544 + 0.1499925004x + x2 = 0.095619937764

Factor a perfect square on the left side:
(x + 0.0749962502)(x + 0.0749962502) = 0.095619937764

Calculate the square root of the right side: 0.309224737

Break this problem into two subproblems by setting 
(x + 0.0749962502) equal to 0.309224737 and -0.309224737.

Subproblem 1

x + 0.0749962502 = 0.309224737 Simplifying x + 0.0749962502 = 0.309224737 Reorder the terms: 0.0749962502 + x = 0.309224737 Solving 0.0749962502 + x = 0.309224737 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0749962502' to each side of the equation. 0.0749962502 + -0.0749962502 + x = 0.309224737 + -0.0749962502 Combine like terms: 0.0749962502 + -0.0749962502 = 0.0000000000 0.0000000000 + x = 0.309224737 + -0.0749962502 x = 0.309224737 + -0.0749962502 Combine like terms: 0.309224737 + -0.0749962502 = 0.2342284868 x = 0.2342284868 Simplifying x = 0.2342284868

Subproblem 2

x + 0.0749962502 = -0.309224737 Simplifying x + 0.0749962502 = -0.309224737 Reorder the terms: 0.0749962502 + x = -0.309224737 Solving 0.0749962502 + x = -0.309224737 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0749962502' to each side of the equation. 0.0749962502 + -0.0749962502 + x = -0.309224737 + -0.0749962502 Combine like terms: 0.0749962502 + -0.0749962502 = 0.0000000000 0.0000000000 + x = -0.309224737 + -0.0749962502 x = -0.309224737 + -0.0749962502 Combine like terms: -0.309224737 + -0.0749962502 = -0.3842209872 x = -0.3842209872 Simplifying x = -0.3842209872

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2342284868, -0.3842209872}

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