500x^2-15.68x-15.68=0

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Solution for 500x^2-15.68x-15.68=0 equation:


Simplifying
500x2 + -15.68x + -15.68 = 0

Reorder the terms:
-15.68 + -15.68x + 500x2 = 0

Solving
-15.68 + -15.68x + 500x2 = 0

Solving for variable 'x'.

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

Divide each side by '500'.
-0.03136 + -0.03136x + x2 = 0

Move the constant term to the right:

Add '0.03136' to each side of the equation.
-0.03136 + -0.03136x + 0.03136 + x2 = 0 + 0.03136

Reorder the terms:
-0.03136 + 0.03136 + -0.03136x + x2 = 0 + 0.03136

Combine like terms: -0.03136 + 0.03136 = 0.00000
0.00000 + -0.03136x + x2 = 0 + 0.03136
-0.03136x + x2 = 0 + 0.03136

Combine like terms: 0 + 0.03136 = 0.03136
-0.03136x + x2 = 0.03136

The x term is -0.03136x.  Take half its coefficient (-0.01568).
Square it (0.0002458624) and add it to both sides.

Add '0.0002458624' to each side of the equation.
-0.03136x + 0.0002458624 + x2 = 0.03136 + 0.0002458624

Reorder the terms:
0.0002458624 + -0.03136x + x2 = 0.03136 + 0.0002458624

Combine like terms: 0.03136 + 0.0002458624 = 0.0316058624
0.0002458624 + -0.03136x + x2 = 0.0316058624

Factor a perfect square on the left side:
(x + -0.01568)(x + -0.01568) = 0.0316058624

Calculate the square root of the right side: 0.177780377

Break this problem into two subproblems by setting 
(x + -0.01568) equal to 0.177780377 and -0.177780377.

Subproblem 1

x + -0.01568 = 0.177780377 Simplifying x + -0.01568 = 0.177780377 Reorder the terms: -0.01568 + x = 0.177780377 Solving -0.01568 + x = 0.177780377 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.01568' to each side of the equation. -0.01568 + 0.01568 + x = 0.177780377 + 0.01568 Combine like terms: -0.01568 + 0.01568 = 0.00000 0.00000 + x = 0.177780377 + 0.01568 x = 0.177780377 + 0.01568 Combine like terms: 0.177780377 + 0.01568 = 0.193460377 x = 0.193460377 Simplifying x = 0.193460377

Subproblem 2

x + -0.01568 = -0.177780377 Simplifying x + -0.01568 = -0.177780377 Reorder the terms: -0.01568 + x = -0.177780377 Solving -0.01568 + x = -0.177780377 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.01568' to each side of the equation. -0.01568 + 0.01568 + x = -0.177780377 + 0.01568 Combine like terms: -0.01568 + 0.01568 = 0.00000 0.00000 + x = -0.177780377 + 0.01568 x = -0.177780377 + 0.01568 Combine like terms: -0.177780377 + 0.01568 = -0.162100377 x = -0.162100377 Simplifying x = -0.162100377

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.193460377, -0.162100377}

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