x^2-5x-164=0

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Solution for x^2-5x-164=0 equation:


Simplifying
x2 + -5x + -164 = 0

Reorder the terms:
-164 + -5x + x2 = 0

Solving
-164 + -5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '164' to each side of the equation.
-164 + -5x + 164 + x2 = 0 + 164

Reorder the terms:
-164 + 164 + -5x + x2 = 0 + 164

Combine like terms: -164 + 164 = 0
0 + -5x + x2 = 0 + 164
-5x + x2 = 0 + 164

Combine like terms: 0 + 164 = 164
-5x + x2 = 164

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 164 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 164 + 6.25

Combine like terms: 164 + 6.25 = 170.25
6.25 + -5x + x2 = 170.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 170.25

Calculate the square root of the right side: 13.047988351

Break this problem into two subproblems by setting 
(x + -2.5) equal to 13.047988351 and -13.047988351.

Subproblem 1

x + -2.5 = 13.047988351 Simplifying x + -2.5 = 13.047988351 Reorder the terms: -2.5 + x = 13.047988351 Solving -2.5 + x = 13.047988351 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 13.047988351 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 13.047988351 + 2.5 x = 13.047988351 + 2.5 Combine like terms: 13.047988351 + 2.5 = 15.547988351 x = 15.547988351 Simplifying x = 15.547988351

Subproblem 2

x + -2.5 = -13.047988351 Simplifying x + -2.5 = -13.047988351 Reorder the terms: -2.5 + x = -13.047988351 Solving -2.5 + x = -13.047988351 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -13.047988351 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -13.047988351 + 2.5 x = -13.047988351 + 2.5 Combine like terms: -13.047988351 + 2.5 = -10.547988351 x = -10.547988351 Simplifying x = -10.547988351

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.547988351, -10.547988351}

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