810000=x^2+x

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Solution for 810000=x^2+x equation:


Simplifying
810000 = x2 + x

Reorder the terms:
810000 = x + x2

Solving
810000 = x + x2

Solving for variable 'x'.

Reorder the terms:
810000 + -1x + -1x2 = x + -1x + x2 + -1x2

Combine like terms: x + -1x = 0
810000 + -1x + -1x2 = 0 + x2 + -1x2
810000 + -1x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
810000 + -1x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-810000 + x + x2 = 0

Move the constant term to the right:

Add '810000' to each side of the equation.
-810000 + x + 810000 + x2 = 0 + 810000

Reorder the terms:
-810000 + 810000 + x + x2 = 0 + 810000

Combine like terms: -810000 + 810000 = 0
0 + x + x2 = 0 + 810000
x + x2 = 0 + 810000

Combine like terms: 0 + 810000 = 810000
x + x2 = 810000

The x term is x.  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.
 + 0.25 + x2 = 810000 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 810000 + 0.25

Combine like terms: 810000 + 0.25 = 810000.25
1.25 + x2 = 810000.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 810000.25

Calculate the square root of the right side: 900.000138889

Break this problem into two subproblems by setting 
(x + 0.5) equal to 900.000138889 and -900.000138889.

Subproblem 1

x + 0.5 = 900.000138889 Simplifying x + 0.5 = 900.000138889 Reorder the terms: 0.5 + x = 900.000138889 Solving 0.5 + x = 900.000138889 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 = 900.000138889 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 900.000138889 + -0.5 x = 900.000138889 + -0.5 Combine like terms: 900.000138889 + -0.5 = 899.500138889 x = 899.500138889 Simplifying x = 899.500138889

Subproblem 2

x + 0.5 = -900.000138889 Simplifying x + 0.5 = -900.000138889 Reorder the terms: 0.5 + x = -900.000138889 Solving 0.5 + x = -900.000138889 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 = -900.000138889 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -900.000138889 + -0.5 x = -900.000138889 + -0.5 Combine like terms: -900.000138889 + -0.5 = -900.500138889 x = -900.500138889 Simplifying x = -900.500138889

Solution

The solution to the problem is based on the solutions from the subproblems. x = {899.500138889, -900.500138889}

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