x^2+5x-4=180

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Solution for x^2+5x-4=180 equation:


Simplifying
x2 + 5x + -4 = 180

Reorder the terms:
-4 + 5x + x2 = 180

Solving
-4 + 5x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
-4 + -180 + 5x + x2 = 180 + -180

Combine like terms: -4 + -180 = -184
-184 + 5x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-184 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '184' to each side of the equation.
-184 + 5x + 184 + x2 = 0 + 184

Reorder the terms:
-184 + 184 + 5x + x2 = 0 + 184

Combine like terms: -184 + 184 = 0
0 + 5x + x2 = 0 + 184
5x + x2 = 0 + 184

Combine like terms: 0 + 184 = 184
5x + x2 = 184

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 = 184 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 184 + 6.25

Combine like terms: 184 + 6.25 = 190.25
6.25 + 5x + x2 = 190.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 190.25

Calculate the square root of the right side: 13.793114224

Break this problem into two subproblems by setting 
(x + 2.5) equal to 13.793114224 and -13.793114224.

Subproblem 1

x + 2.5 = 13.793114224 Simplifying x + 2.5 = 13.793114224 Reorder the terms: 2.5 + x = 13.793114224 Solving 2.5 + x = 13.793114224 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 = 13.793114224 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 13.793114224 + -2.5 x = 13.793114224 + -2.5 Combine like terms: 13.793114224 + -2.5 = 11.293114224 x = 11.293114224 Simplifying x = 11.293114224

Subproblem 2

x + 2.5 = -13.793114224 Simplifying x + 2.5 = -13.793114224 Reorder the terms: 2.5 + x = -13.793114224 Solving 2.5 + x = -13.793114224 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 = -13.793114224 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -13.793114224 + -2.5 x = -13.793114224 + -2.5 Combine like terms: -13.793114224 + -2.5 = -16.293114224 x = -16.293114224 Simplifying x = -16.293114224

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.293114224, -16.293114224}

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