x^2+2x+10=121

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Solution for x^2+2x+10=121 equation:


Simplifying
x2 + 2x + 10 = 121

Reorder the terms:
10 + 2x + x2 = 121

Solving
10 + 2x + x2 = 121

Solving for variable 'x'.

Reorder the terms:
10 + -121 + 2x + x2 = 121 + -121

Combine like terms: 10 + -121 = -111
-111 + 2x + x2 = 121 + -121

Combine like terms: 121 + -121 = 0
-111 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '111' to each side of the equation.
-111 + 2x + 111 + x2 = 0 + 111

Reorder the terms:
-111 + 111 + 2x + x2 = 0 + 111

Combine like terms: -111 + 111 = 0
0 + 2x + x2 = 0 + 111
2x + x2 = 0 + 111

Combine like terms: 0 + 111 = 111
2x + x2 = 111

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 111 + 1

Reorder the terms:
1 + 2x + x2 = 111 + 1

Combine like terms: 111 + 1 = 112
1 + 2x + x2 = 112

Factor a perfect square on the left side:
(x + 1)(x + 1) = 112

Calculate the square root of the right side: 10.583005244

Break this problem into two subproblems by setting 
(x + 1) equal to 10.583005244 and -10.583005244.

Subproblem 1

x + 1 = 10.583005244 Simplifying x + 1 = 10.583005244 Reorder the terms: 1 + x = 10.583005244 Solving 1 + x = 10.583005244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 10.583005244 + -1 Combine like terms: 1 + -1 = 0 0 + x = 10.583005244 + -1 x = 10.583005244 + -1 Combine like terms: 10.583005244 + -1 = 9.583005244 x = 9.583005244 Simplifying x = 9.583005244

Subproblem 2

x + 1 = -10.583005244 Simplifying x + 1 = -10.583005244 Reorder the terms: 1 + x = -10.583005244 Solving 1 + x = -10.583005244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -10.583005244 + -1 Combine like terms: 1 + -1 = 0 0 + x = -10.583005244 + -1 x = -10.583005244 + -1 Combine like terms: -10.583005244 + -1 = -11.583005244 x = -11.583005244 Simplifying x = -11.583005244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.583005244, -11.583005244}

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