x^2-6x-57=0

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Solution for x^2-6x-57=0 equation:


Simplifying
x2 + -6x + -57 = 0

Reorder the terms:
-57 + -6x + x2 = 0

Solving
-57 + -6x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '57' to each side of the equation.
-57 + -6x + 57 + x2 = 0 + 57

Reorder the terms:
-57 + 57 + -6x + x2 = 0 + 57

Combine like terms: -57 + 57 = 0
0 + -6x + x2 = 0 + 57
-6x + x2 = 0 + 57

Combine like terms: 0 + 57 = 57
-6x + x2 = 57

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 57 + 9

Reorder the terms:
9 + -6x + x2 = 57 + 9

Combine like terms: 57 + 9 = 66
9 + -6x + x2 = 66

Factor a perfect square on the left side:
(x + -3)(x + -3) = 66

Calculate the square root of the right side: 8.124038405

Break this problem into two subproblems by setting 
(x + -3) equal to 8.124038405 and -8.124038405.

Subproblem 1

x + -3 = 8.124038405 Simplifying x + -3 = 8.124038405 Reorder the terms: -3 + x = 8.124038405 Solving -3 + x = 8.124038405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 8.124038405 + 3 Combine like terms: -3 + 3 = 0 0 + x = 8.124038405 + 3 x = 8.124038405 + 3 Combine like terms: 8.124038405 + 3 = 11.124038405 x = 11.124038405 Simplifying x = 11.124038405

Subproblem 2

x + -3 = -8.124038405 Simplifying x + -3 = -8.124038405 Reorder the terms: -3 + x = -8.124038405 Solving -3 + x = -8.124038405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -8.124038405 + 3 Combine like terms: -3 + 3 = 0 0 + x = -8.124038405 + 3 x = -8.124038405 + 3 Combine like terms: -8.124038405 + 3 = -5.124038405 x = -5.124038405 Simplifying x = -5.124038405

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.124038405, -5.124038405}

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