5x+x^2-220=0

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Solution for 5x+x^2-220=0 equation:


Simplifying
5x + x2 + -220 = 0

Reorder the terms:
-220 + 5x + x2 = 0

Solving
-220 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '220' to each side of the equation.
-220 + 5x + 220 + x2 = 0 + 220

Reorder the terms:
-220 + 220 + 5x + x2 = 0 + 220

Combine like terms: -220 + 220 = 0
0 + 5x + x2 = 0 + 220
5x + x2 = 0 + 220

Combine like terms: 0 + 220 = 220
5x + x2 = 220

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 = 220 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 220 + 6.25

Combine like terms: 220 + 6.25 = 226.25
6.25 + 5x + x2 = 226.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 226.25

Calculate the square root of the right side: 15.041608956

Break this problem into two subproblems by setting 
(x + 2.5) equal to 15.041608956 and -15.041608956.

Subproblem 1

x + 2.5 = 15.041608956 Simplifying x + 2.5 = 15.041608956 Reorder the terms: 2.5 + x = 15.041608956 Solving 2.5 + x = 15.041608956 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 = 15.041608956 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 15.041608956 + -2.5 x = 15.041608956 + -2.5 Combine like terms: 15.041608956 + -2.5 = 12.541608956 x = 12.541608956 Simplifying x = 12.541608956

Subproblem 2

x + 2.5 = -15.041608956 Simplifying x + 2.5 = -15.041608956 Reorder the terms: 2.5 + x = -15.041608956 Solving 2.5 + x = -15.041608956 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 = -15.041608956 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -15.041608956 + -2.5 x = -15.041608956 + -2.5 Combine like terms: -15.041608956 + -2.5 = -17.541608956 x = -17.541608956 Simplifying x = -17.541608956

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.541608956, -17.541608956}

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