180=x^2+5x-36

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Solution for 180=x^2+5x-36 equation:


Simplifying
180 = x2 + 5x + -36

Reorder the terms:
180 = -36 + 5x + x2

Solving
180 = -36 + 5x + x2

Solving for variable 'x'.

Combine like terms: 180 + 36 = 216
216 + -5x + -1x2 = -36 + 5x + x2 + 36 + -5x + -1x2

Reorder the terms:
216 + -5x + -1x2 = -36 + 36 + 5x + -5x + x2 + -1x2

Combine like terms: -36 + 36 = 0
216 + -5x + -1x2 = 0 + 5x + -5x + x2 + -1x2
216 + -5x + -1x2 = 5x + -5x + x2 + -1x2

Combine like terms: 5x + -5x = 0
216 + -5x + -1x2 = 0 + x2 + -1x2
216 + -5x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
216 + -5x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-216 + 5x + x2 = 0

Move the constant term to the right:

Add '216' to each side of the equation.
-216 + 5x + 216 + x2 = 0 + 216

Reorder the terms:
-216 + 216 + 5x + x2 = 0 + 216

Combine like terms: -216 + 216 = 0
0 + 5x + x2 = 0 + 216
5x + x2 = 0 + 216

Combine like terms: 0 + 216 = 216
5x + x2 = 216

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 = 216 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 216 + 6.25

Combine like terms: 216 + 6.25 = 222.25
6.25 + 5x + x2 = 222.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 222.25

Calculate the square root of the right side: 14.908051516

Break this problem into two subproblems by setting 
(x + 2.5) equal to 14.908051516 and -14.908051516.

Subproblem 1

x + 2.5 = 14.908051516 Simplifying x + 2.5 = 14.908051516 Reorder the terms: 2.5 + x = 14.908051516 Solving 2.5 + x = 14.908051516 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 = 14.908051516 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 14.908051516 + -2.5 x = 14.908051516 + -2.5 Combine like terms: 14.908051516 + -2.5 = 12.408051516 x = 12.408051516 Simplifying x = 12.408051516

Subproblem 2

x + 2.5 = -14.908051516 Simplifying x + 2.5 = -14.908051516 Reorder the terms: 2.5 + x = -14.908051516 Solving 2.5 + x = -14.908051516 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 = -14.908051516 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -14.908051516 + -2.5 x = -14.908051516 + -2.5 Combine like terms: -14.908051516 + -2.5 = -17.408051516 x = -17.408051516 Simplifying x = -17.408051516

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.408051516, -17.408051516}

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