x^2+2x=110

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Solution for x^2+2x=110 equation:


Simplifying
x2 + 2x = 110

Reorder the terms:
2x + x2 = 110

Solving
2x + x2 = 110

Solving for variable 'x'.

Reorder the terms:
-110 + 2x + x2 = 110 + -110

Combine like terms: 110 + -110 = 0
-110 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '110' to each side of the equation.
-110 + 2x + 110 + x2 = 0 + 110

Reorder the terms:
-110 + 110 + 2x + x2 = 0 + 110

Combine like terms: -110 + 110 = 0
0 + 2x + x2 = 0 + 110
2x + x2 = 0 + 110

Combine like terms: 0 + 110 = 110
2x + x2 = 110

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 = 110 + 1

Reorder the terms:
1 + 2x + x2 = 110 + 1

Combine like terms: 110 + 1 = 111
1 + 2x + x2 = 111

Factor a perfect square on the left side:
(x + 1)(x + 1) = 111

Calculate the square root of the right side: 10.535653753

Break this problem into two subproblems by setting 
(x + 1) equal to 10.535653753 and -10.535653753.

Subproblem 1

x + 1 = 10.535653753 Simplifying x + 1 = 10.535653753 Reorder the terms: 1 + x = 10.535653753 Solving 1 + x = 10.535653753 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 = 10.535653753 + -1 Combine like terms: 1 + -1 = 0 0 + x = 10.535653753 + -1 x = 10.535653753 + -1 Combine like terms: 10.535653753 + -1 = 9.535653753 x = 9.535653753 Simplifying x = 9.535653753

Subproblem 2

x + 1 = -10.535653753 Simplifying x + 1 = -10.535653753 Reorder the terms: 1 + x = -10.535653753 Solving 1 + x = -10.535653753 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 = -10.535653753 + -1 Combine like terms: 1 + -1 = 0 0 + x = -10.535653753 + -1 x = -10.535653753 + -1 Combine like terms: -10.535653753 + -1 = -11.535653753 x = -11.535653753 Simplifying x = -11.535653753

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.535653753, -11.535653753}

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