(x^2)+11x-147=0

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Solution for (x^2)+11x-147=0 equation:


Simplifying
(x2) + 11x + -147 = 0
x2 + 11x + -147 = 0

Reorder the terms:
-147 + 11x + x2 = 0

Solving
-147 + 11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '147' to each side of the equation.
-147 + 11x + 147 + x2 = 0 + 147

Reorder the terms:
-147 + 147 + 11x + x2 = 0 + 147

Combine like terms: -147 + 147 = 0
0 + 11x + x2 = 0 + 147
11x + x2 = 0 + 147

Combine like terms: 0 + 147 = 147
11x + x2 = 147

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 = 147 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 147 + 30.25

Combine like terms: 147 + 30.25 = 177.25
30.25 + 11x + x2 = 177.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 177.25

Calculate the square root of the right side: 13.313526956

Break this problem into two subproblems by setting 
(x + 5.5) equal to 13.313526956 and -13.313526956.

Subproblem 1

x + 5.5 = 13.313526956 Simplifying x + 5.5 = 13.313526956 Reorder the terms: 5.5 + x = 13.313526956 Solving 5.5 + x = 13.313526956 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 = 13.313526956 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 13.313526956 + -5.5 x = 13.313526956 + -5.5 Combine like terms: 13.313526956 + -5.5 = 7.813526956 x = 7.813526956 Simplifying x = 7.813526956

Subproblem 2

x + 5.5 = -13.313526956 Simplifying x + 5.5 = -13.313526956 Reorder the terms: 5.5 + x = -13.313526956 Solving 5.5 + x = -13.313526956 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 = -13.313526956 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -13.313526956 + -5.5 x = -13.313526956 + -5.5 Combine like terms: -13.313526956 + -5.5 = -18.813526956 x = -18.813526956 Simplifying x = -18.813526956

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.813526956, -18.813526956}

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