1000x^2-1000x-806.25=0

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Solution for 1000x^2-1000x-806.25=0 equation:


Simplifying
1000x2 + -1000x + -806.25 = 0

Reorder the terms:
-806.25 + -1000x + 1000x2 = 0

Solving
-806.25 + -1000x + 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'.
-0.80625 + -1x + x2 = 0

Move the constant term to the right:

Add '0.80625' to each side of the equation.
-0.80625 + -1x + 0.80625 + x2 = 0 + 0.80625

Reorder the terms:
-0.80625 + 0.80625 + -1x + x2 = 0 + 0.80625

Combine like terms: -0.80625 + 0.80625 = 0.00000
0.00000 + -1x + x2 = 0 + 0.80625
-1x + x2 = 0 + 0.80625

Combine like terms: 0 + 0.80625 = 0.80625
-1x + x2 = 0.80625

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 0.80625 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 0.80625 + 0.25

Combine like terms: 0.80625 + 0.25 = 1.05625
0.25 + -1x + x2 = 1.05625

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 1.05625

Calculate the square root of the right side: 1.02774024

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.02774024 and -1.02774024.

Subproblem 1

x + -0.5 = 1.02774024 Simplifying x + -0.5 = 1.02774024 Reorder the terms: -0.5 + x = 1.02774024 Solving -0.5 + x = 1.02774024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 1.02774024 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.02774024 + 0.5 x = 1.02774024 + 0.5 Combine like terms: 1.02774024 + 0.5 = 1.52774024 x = 1.52774024 Simplifying x = 1.52774024

Subproblem 2

x + -0.5 = -1.02774024 Simplifying x + -0.5 = -1.02774024 Reorder the terms: -0.5 + x = -1.02774024 Solving -0.5 + x = -1.02774024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -1.02774024 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.02774024 + 0.5 x = -1.02774024 + 0.5 Combine like terms: -1.02774024 + 0.5 = -0.52774024 x = -0.52774024 Simplifying x = -0.52774024

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.52774024, -0.52774024}

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