x*x+1*x-1=210

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Solution for x*x+1*x-1=210 equation:


Simplifying
x * x + 1x + -1 = 210

Multiply x * x
x2 + 1x + -1 = 210

Reorder the terms:
-1 + 1x + x2 = 210

Solving
-1 + 1x + x2 = 210

Solving for variable 'x'.

Reorder the terms:
-1 + -210 + 1x + x2 = 210 + -210

Combine like terms: -1 + -210 = -211
-211 + 1x + x2 = 210 + -210

Combine like terms: 210 + -210 = 0
-211 + 1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '211' to each side of the equation.
-211 + 1x + 211 + x2 = 0 + 211

Reorder the terms:
-211 + 211 + 1x + x2 = 0 + 211

Combine like terms: -211 + 211 = 0
0 + 1x + x2 = 0 + 211
1x + x2 = 0 + 211

Combine like terms: 0 + 211 = 211
1x + x2 = 211

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.
x + 0.25 + x2 = 211 + 0.25

Reorder the terms:
0.25 + x + x2 = 211 + 0.25

Combine like terms: 211 + 0.25 = 211.25
0.25 + x + x2 = 211.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 211.25

Calculate the square root of the right side: 14.534441854

Break this problem into two subproblems by setting 
(x + 0.5) equal to 14.534441854 and -14.534441854.

Subproblem 1

x + 0.5 = 14.534441854 Simplifying x + 0.5 = 14.534441854 Reorder the terms: 0.5 + x = 14.534441854 Solving 0.5 + x = 14.534441854 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 = 14.534441854 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 14.534441854 + -0.5 x = 14.534441854 + -0.5 Combine like terms: 14.534441854 + -0.5 = 14.034441854 x = 14.034441854 Simplifying x = 14.034441854

Subproblem 2

x + 0.5 = -14.534441854 Simplifying x + 0.5 = -14.534441854 Reorder the terms: 0.5 + x = -14.534441854 Solving 0.5 + x = -14.534441854 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 = -14.534441854 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -14.534441854 + -0.5 x = -14.534441854 + -0.5 Combine like terms: -14.534441854 + -0.5 = -15.034441854 x = -15.034441854 Simplifying x = -15.034441854

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.034441854, -15.034441854}

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