11x^2-65x-36=0

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Solution for 11x^2-65x-36=0 equation:


Simplifying
11x2 + -65x + -36 = 0

Reorder the terms:
-36 + -65x + 11x2 = 0

Solving
-36 + -65x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
-3.272727273 + -5.909090909x + x2 = 0

Move the constant term to the right:

Add '3.272727273' to each side of the equation.
-3.272727273 + -5.909090909x + 3.272727273 + x2 = 0 + 3.272727273

Reorder the terms:
-3.272727273 + 3.272727273 + -5.909090909x + x2 = 0 + 3.272727273

Combine like terms: -3.272727273 + 3.272727273 = 0.000000000
0.000000000 + -5.909090909x + x2 = 0 + 3.272727273
-5.909090909x + x2 = 0 + 3.272727273

Combine like terms: 0 + 3.272727273 = 3.272727273
-5.909090909x + x2 = 3.272727273

The x term is -5.909090909x.  Take half its coefficient (-2.954545455).
Square it (8.729338846) and add it to both sides.

Add '8.729338846' to each side of the equation.
-5.909090909x + 8.729338846 + x2 = 3.272727273 + 8.729338846

Reorder the terms:
8.729338846 + -5.909090909x + x2 = 3.272727273 + 8.729338846

Combine like terms: 3.272727273 + 8.729338846 = 12.002066119
8.729338846 + -5.909090909x + x2 = 12.002066119

Factor a perfect square on the left side:
(x + -2.954545455)(x + -2.954545455) = 12.002066119

Calculate the square root of the right side: 3.464399821

Break this problem into two subproblems by setting 
(x + -2.954545455) equal to 3.464399821 and -3.464399821.

Subproblem 1

x + -2.954545455 = 3.464399821 Simplifying x + -2.954545455 = 3.464399821 Reorder the terms: -2.954545455 + x = 3.464399821 Solving -2.954545455 + x = 3.464399821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.954545455' to each side of the equation. -2.954545455 + 2.954545455 + x = 3.464399821 + 2.954545455 Combine like terms: -2.954545455 + 2.954545455 = 0.000000000 0.000000000 + x = 3.464399821 + 2.954545455 x = 3.464399821 + 2.954545455 Combine like terms: 3.464399821 + 2.954545455 = 6.418945276 x = 6.418945276 Simplifying x = 6.418945276

Subproblem 2

x + -2.954545455 = -3.464399821 Simplifying x + -2.954545455 = -3.464399821 Reorder the terms: -2.954545455 + x = -3.464399821 Solving -2.954545455 + x = -3.464399821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.954545455' to each side of the equation. -2.954545455 + 2.954545455 + x = -3.464399821 + 2.954545455 Combine like terms: -2.954545455 + 2.954545455 = 0.000000000 0.000000000 + x = -3.464399821 + 2.954545455 x = -3.464399821 + 2.954545455 Combine like terms: -3.464399821 + 2.954545455 = -0.509854366 x = -0.509854366 Simplifying x = -0.509854366

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.418945276, -0.509854366}

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