x^2+11x=154

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Solution for x^2+11x=154 equation:


Simplifying
x2 + 11x = 154

Reorder the terms:
11x + x2 = 154

Solving
11x + x2 = 154

Solving for variable 'x'.

Reorder the terms:
-154 + 11x + x2 = 154 + -154

Combine like terms: 154 + -154 = 0
-154 + 11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '154' to each side of the equation.
-154 + 11x + 154 + x2 = 0 + 154

Reorder the terms:
-154 + 154 + 11x + x2 = 0 + 154

Combine like terms: -154 + 154 = 0
0 + 11x + x2 = 0 + 154
11x + x2 = 0 + 154

Combine like terms: 0 + 154 = 154
11x + x2 = 154

The x term is 11x.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11x + 30.25 + x2 = 154 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 154 + 30.25

Combine like terms: 154 + 30.25 = 184.25
30.25 + 11x + x2 = 184.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 184.25

Calculate the square root of the right side: 13.57387196

Break this problem into two subproblems by setting 
(x + 5.5) equal to 13.57387196 and -13.57387196.

Subproblem 1

x + 5.5 = 13.57387196 Simplifying x + 5.5 = 13.57387196 Reorder the terms: 5.5 + x = 13.57387196 Solving 5.5 + x = 13.57387196 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = 13.57387196 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 13.57387196 + -5.5 x = 13.57387196 + -5.5 Combine like terms: 13.57387196 + -5.5 = 8.07387196 x = 8.07387196 Simplifying x = 8.07387196

Subproblem 2

x + 5.5 = -13.57387196 Simplifying x + 5.5 = -13.57387196 Reorder the terms: 5.5 + x = -13.57387196 Solving 5.5 + x = -13.57387196 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = -13.57387196 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -13.57387196 + -5.5 x = -13.57387196 + -5.5 Combine like terms: -13.57387196 + -5.5 = -19.07387196 x = -19.07387196 Simplifying x = -19.07387196

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.07387196, -19.07387196}

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