x^2+5x-25=13

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Solution for x^2+5x-25=13 equation:


Simplifying
x2 + 5x + -25 = 13

Reorder the terms:
-25 + 5x + x2 = 13

Solving
-25 + 5x + x2 = 13

Solving for variable 'x'.

Reorder the terms:
-25 + -13 + 5x + x2 = 13 + -13

Combine like terms: -25 + -13 = -38
-38 + 5x + x2 = 13 + -13

Combine like terms: 13 + -13 = 0
-38 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + 5x + 38 + x2 = 0 + 38

Reorder the terms:
-38 + 38 + 5x + x2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + 5x + x2 = 0 + 38
5x + x2 = 0 + 38

Combine like terms: 0 + 38 = 38
5x + x2 = 38

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 = 38 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 38 + 6.25

Combine like terms: 38 + 6.25 = 44.25
6.25 + 5x + x2 = 44.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(x + 2.5) equal to 6.652067348 and -6.652067348.


Subproblem 1
x + 2.5 = 6.652067348

Simplifying
x + 2.5 = 6.652067348

Reorder the terms:
2.5 + x = 6.652067348

Solving
2.5 + x = 6.652067348

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 = 6.652067348 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + x = 6.652067348 + -2.5
x = 6.652067348 + -2.5

Combine like terms: 6.652067348 + -2.5 = 4.152067348
x = 4.152067348

Simplifying
x = 4.152067348


Subproblem 2
x + 2.5 = -6.652067348

Simplifying
x + 2.5 = -6.652067348

Reorder the terms:
2.5 + x = -6.652067348

Solving
2.5 + x = -6.652067348

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 = -6.652067348 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + x = -6.652067348 + -2.5
x = -6.652067348 + -2.5

Combine like terms: -6.652067348 + -2.5 = -9.152067348
x = -9.152067348

Simplifying
x = -9.152067348


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {4.152067348, -9.152067348}

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