x^2+10x=136

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Solution for x^2+10x=136 equation:


Simplifying
x2 + 10x = 136

Reorder the terms:
10x + x2 = 136

Solving
10x + x2 = 136

Solving for variable 'x'.

Reorder the terms:
-136 + 10x + x2 = 136 + -136

Combine like terms: 136 + -136 = 0
-136 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '136' to each side of the equation.
-136 + 10x + 136 + x2 = 0 + 136

Reorder the terms:
-136 + 136 + 10x + x2 = 0 + 136

Combine like terms: -136 + 136 = 0
0 + 10x + x2 = 0 + 136
10x + x2 = 0 + 136

Combine like terms: 0 + 136 = 136
10x + x2 = 136

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 136 + 25

Reorder the terms:
25 + 10x + x2 = 136 + 25

Combine like terms: 136 + 25 = 161
25 + 10x + x2 = 161

Factor a perfect square on the left side:
(x + 5)(x + 5) = 161

Calculate the square root of the right side: 12.68857754

Break this problem into two subproblems by setting 
(x + 5) equal to 12.68857754 and -12.68857754.

Subproblem 1

x + 5 = 12.68857754 Simplifying x + 5 = 12.68857754 Reorder the terms: 5 + x = 12.68857754 Solving 5 + x = 12.68857754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 12.68857754 + -5 Combine like terms: 5 + -5 = 0 0 + x = 12.68857754 + -5 x = 12.68857754 + -5 Combine like terms: 12.68857754 + -5 = 7.68857754 x = 7.68857754 Simplifying x = 7.68857754

Subproblem 2

x + 5 = -12.68857754 Simplifying x + 5 = -12.68857754 Reorder the terms: 5 + x = -12.68857754 Solving 5 + x = -12.68857754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -12.68857754 + -5 Combine like terms: 5 + -5 = 0 0 + x = -12.68857754 + -5 x = -12.68857754 + -5 Combine like terms: -12.68857754 + -5 = -17.68857754 x = -17.68857754 Simplifying x = -17.68857754

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.68857754, -17.68857754}

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