x^2-26x-57=0

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Solution for x^2-26x-57=0 equation:


Simplifying
x2 + -26x + -57 = 0

Reorder the terms:
-57 + -26x + x2 = 0

Solving
-57 + -26x + 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 + -26x + 57 + x2 = 0 + 57

Reorder the terms:
-57 + 57 + -26x + x2 = 0 + 57

Combine like terms: -57 + 57 = 0
0 + -26x + x2 = 0 + 57
-26x + x2 = 0 + 57

Combine like terms: 0 + 57 = 57
-26x + x2 = 57

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = 57 + 169

Reorder the terms:
169 + -26x + x2 = 57 + 169

Combine like terms: 57 + 169 = 226
169 + -26x + x2 = 226

Factor a perfect square on the left side:
(x + -13)(x + -13) = 226

Calculate the square root of the right side: 15.033296378

Break this problem into two subproblems by setting 
(x + -13) equal to 15.033296378 and -15.033296378.

Subproblem 1

x + -13 = 15.033296378 Simplifying x + -13 = 15.033296378 Reorder the terms: -13 + x = 15.033296378 Solving -13 + x = 15.033296378 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 15.033296378 + 13 Combine like terms: -13 + 13 = 0 0 + x = 15.033296378 + 13 x = 15.033296378 + 13 Combine like terms: 15.033296378 + 13 = 28.033296378 x = 28.033296378 Simplifying x = 28.033296378

Subproblem 2

x + -13 = -15.033296378 Simplifying x + -13 = -15.033296378 Reorder the terms: -13 + x = -15.033296378 Solving -13 + x = -15.033296378 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -15.033296378 + 13 Combine like terms: -13 + 13 = 0 0 + x = -15.033296378 + 13 x = -15.033296378 + 13 Combine like terms: -15.033296378 + 13 = -2.033296378 x = -2.033296378 Simplifying x = -2.033296378

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.033296378, -2.033296378}

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