x^2-26x-144=0

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Solution for x^2-26x-144=0 equation:


Simplifying
x2 + -26x + -144 = 0

Reorder the terms:
-144 + -26x + x2 = 0

Solving
-144 + -26x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + -26x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + -26x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + -26x + x2 = 0 + 144
-26x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
-26x + x2 = 144

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 = 144 + 169

Reorder the terms:
169 + -26x + x2 = 144 + 169

Combine like terms: 144 + 169 = 313
169 + -26x + x2 = 313

Factor a perfect square on the left side:
(x + -13)(x + -13) = 313

Calculate the square root of the right side: 17.691806013

Break this problem into two subproblems by setting 
(x + -13) equal to 17.691806013 and -17.691806013.

Subproblem 1

x + -13 = 17.691806013 Simplifying x + -13 = 17.691806013 Reorder the terms: -13 + x = 17.691806013 Solving -13 + x = 17.691806013 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 = 17.691806013 + 13 Combine like terms: -13 + 13 = 0 0 + x = 17.691806013 + 13 x = 17.691806013 + 13 Combine like terms: 17.691806013 + 13 = 30.691806013 x = 30.691806013 Simplifying x = 30.691806013

Subproblem 2

x + -13 = -17.691806013 Simplifying x + -13 = -17.691806013 Reorder the terms: -13 + x = -17.691806013 Solving -13 + x = -17.691806013 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 = -17.691806013 + 13 Combine like terms: -13 + 13 = 0 0 + x = -17.691806013 + 13 x = -17.691806013 + 13 Combine like terms: -17.691806013 + 13 = -4.691806013 x = -4.691806013 Simplifying x = -4.691806013

Solution

The solution to the problem is based on the solutions from the subproblems. x = {30.691806013, -4.691806013}

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