0=11x^2-13x-306

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Solution for 0=11x^2-13x-306 equation:


Simplifying
0 = 11x2 + -13x + -306

Reorder the terms:
0 = -306 + -13x + 11x2

Solving
0 = -306 + -13x + 11x2

Solving for variable 'x'.

Combine like terms: 0 + 306 = 306
306 + 13x + -11x2 = -306 + -13x + 11x2 + 306 + 13x + -11x2

Reorder the terms:
306 + 13x + -11x2 = -306 + 306 + -13x + 13x + 11x2 + -11x2

Combine like terms: -306 + 306 = 0
306 + 13x + -11x2 = 0 + -13x + 13x + 11x2 + -11x2
306 + 13x + -11x2 = -13x + 13x + 11x2 + -11x2

Combine like terms: -13x + 13x = 0
306 + 13x + -11x2 = 0 + 11x2 + -11x2
306 + 13x + -11x2 = 11x2 + -11x2

Combine like terms: 11x2 + -11x2 = 0
306 + 13x + -11x2 = 0

Begin completing the square.  Divide all terms by
-11 the coefficient of the squared term: 

Divide each side by '-11'.
-27.81818182 + -1.181818182x + x2 = 0

Move the constant term to the right:

Add '27.81818182' to each side of the equation.
-27.81818182 + -1.181818182x + 27.81818182 + x2 = 0 + 27.81818182

Reorder the terms:
-27.81818182 + 27.81818182 + -1.181818182x + x2 = 0 + 27.81818182

Combine like terms: -27.81818182 + 27.81818182 = 0.00000000
0.00000000 + -1.181818182x + x2 = 0 + 27.81818182
-1.181818182x + x2 = 0 + 27.81818182

Combine like terms: 0 + 27.81818182 = 27.81818182
-1.181818182x + x2 = 27.81818182

The x term is -1.181818182x.  Take half its coefficient (-0.590909091).
Square it (0.3491735538) and add it to both sides.

Add '0.3491735538' to each side of the equation.
-1.181818182x + 0.3491735538 + x2 = 27.81818182 + 0.3491735538

Reorder the terms:
0.3491735538 + -1.181818182x + x2 = 27.81818182 + 0.3491735538

Combine like terms: 27.81818182 + 0.3491735538 = 28.1673553738
0.3491735538 + -1.181818182x + x2 = 28.1673553738

Factor a perfect square on the left side:
(x + -0.590909091)(x + -0.590909091) = 28.1673553738

Calculate the square root of the right side: 5.30729266

Break this problem into two subproblems by setting 
(x + -0.590909091) equal to 5.30729266 and -5.30729266.

Subproblem 1

x + -0.590909091 = 5.30729266 Simplifying x + -0.590909091 = 5.30729266 Reorder the terms: -0.590909091 + x = 5.30729266 Solving -0.590909091 + x = 5.30729266 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.590909091' to each side of the equation. -0.590909091 + 0.590909091 + x = 5.30729266 + 0.590909091 Combine like terms: -0.590909091 + 0.590909091 = 0.000000000 0.000000000 + x = 5.30729266 + 0.590909091 x = 5.30729266 + 0.590909091 Combine like terms: 5.30729266 + 0.590909091 = 5.898201751 x = 5.898201751 Simplifying x = 5.898201751

Subproblem 2

x + -0.590909091 = -5.30729266 Simplifying x + -0.590909091 = -5.30729266 Reorder the terms: -0.590909091 + x = -5.30729266 Solving -0.590909091 + x = -5.30729266 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.590909091' to each side of the equation. -0.590909091 + 0.590909091 + x = -5.30729266 + 0.590909091 Combine like terms: -0.590909091 + 0.590909091 = 0.000000000 0.000000000 + x = -5.30729266 + 0.590909091 x = -5.30729266 + 0.590909091 Combine like terms: -5.30729266 + 0.590909091 = -4.716383569 x = -4.716383569 Simplifying x = -4.716383569

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.898201751, -4.716383569}

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