1000x^2+71x-71=0

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Solution for 1000x^2+71x-71=0 equation:


Simplifying
1000x2 + 71x + -71 = 0

Reorder the terms:
-71 + 71x + 1000x2 = 0

Solving
-71 + 71x + 1000x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
1000 the coefficient of the squared term: 

Divide each side by '1000'.
-0.071 + 0.071x + x2 = 0

Move the constant term to the right:

Add '0.071' to each side of the equation.
-0.071 + 0.071x + 0.071 + x2 = 0 + 0.071

Reorder the terms:
-0.071 + 0.071 + 0.071x + x2 = 0 + 0.071

Combine like terms: -0.071 + 0.071 = 0.000
0.000 + 0.071x + x2 = 0 + 0.071
0.071x + x2 = 0 + 0.071

Combine like terms: 0 + 0.071 = 0.071
0.071x + x2 = 0.071

The x term is 0.071x.  Take half its coefficient (0.0355).
Square it (0.00126025) and add it to both sides.

Add '0.00126025' to each side of the equation.
0.071x + 0.00126025 + x2 = 0.071 + 0.00126025

Reorder the terms:
0.00126025 + 0.071x + x2 = 0.071 + 0.00126025

Combine like terms: 0.071 + 0.00126025 = 0.07226025
0.00126025 + 0.071x + x2 = 0.07226025

Factor a perfect square on the left side:
(x + 0.0355)(x + 0.0355) = 0.07226025

Calculate the square root of the right side: 0.268812667

Break this problem into two subproblems by setting 
(x + 0.0355) equal to 0.268812667 and -0.268812667.

Subproblem 1

x + 0.0355 = 0.268812667 Simplifying x + 0.0355 = 0.268812667 Reorder the terms: 0.0355 + x = 0.268812667 Solving 0.0355 + x = 0.268812667 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0355' to each side of the equation. 0.0355 + -0.0355 + x = 0.268812667 + -0.0355 Combine like terms: 0.0355 + -0.0355 = 0.0000 0.0000 + x = 0.268812667 + -0.0355 x = 0.268812667 + -0.0355 Combine like terms: 0.268812667 + -0.0355 = 0.233312667 x = 0.233312667 Simplifying x = 0.233312667

Subproblem 2

x + 0.0355 = -0.268812667 Simplifying x + 0.0355 = -0.268812667 Reorder the terms: 0.0355 + x = -0.268812667 Solving 0.0355 + x = -0.268812667 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0355' to each side of the equation. 0.0355 + -0.0355 + x = -0.268812667 + -0.0355 Combine like terms: 0.0355 + -0.0355 = 0.0000 0.0000 + x = -0.268812667 + -0.0355 x = -0.268812667 + -0.0355 Combine like terms: -0.268812667 + -0.0355 = -0.304312667 x = -0.304312667 Simplifying x = -0.304312667

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.233312667, -0.304312667}

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