35=x^2+x

Solution for 35=x^2+x equation:

Simplifying
35 = x2 + x

Reorder the terms:
35 = x + x2

Solving
35 = x + x2

Solving for variable 'x'.

Reorder the terms:
35 + -1x + -1x2 = x + -1x + x2 + -1x2

Combine like terms: x + -1x = 0
35 + -1x + -1x2 = 0 + x2 + -1x2
35 + -1x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
35 + -1x + -1x2 = 0

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

Divide each side by '-1'.
-35 + x + x2 = 0

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + x + x2 = 0 + 35
x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
x + x2 = 35

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 = 35 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 35 + 0.25

Combine like terms: 35 + 0.25 = 35.25
1.25 + x2 = 35.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 35.25

Calculate the square root of the right side: 5.937171044

Break this problem into two subproblems by setting 
(x + 0.5) equal to 5.937171044 and -5.937171044.

Subproblem 1
x + 0.5 = 5.937171044

Simplifying
x + 0.5 = 5.937171044

Reorder the terms:
0.5 + x = 5.937171044

Solving
0.5 + x = 5.937171044

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 = 5.937171044 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + x = 5.937171044 + -0.5
x = 5.937171044 + -0.5

Combine like terms: 5.937171044 + -0.5 = 5.437171044
x = 5.437171044

Simplifying
x = 5.437171044

Subproblem 2
x + 0.5 = -5.937171044

Simplifying
x + 0.5 = -5.937171044

Reorder the terms:
0.5 + x = -5.937171044

Solving
0.5 + x = -5.937171044

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 = -5.937171044 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + x = -5.937171044 + -0.5
x = -5.937171044 + -0.5

Combine like terms: -5.937171044 + -0.5 = -6.437171044
x = -6.437171044

Simplifying
x = -6.437171044

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {5.437171044, -6.437171044}