x^2+120x=3500

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Solution for x^2+120x=3500 equation:


Simplifying
x2 + 120x = 3500

Reorder the terms:
120x + x2 = 3500

Solving
120x + x2 = 3500

Solving for variable 'x'.

Reorder the terms:
-3500 + 120x + x2 = 3500 + -3500

Combine like terms: 3500 + -3500 = 0
-3500 + 120x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3500' to each side of the equation.
-3500 + 120x + 3500 + x2 = 0 + 3500

Reorder the terms:
-3500 + 3500 + 120x + x2 = 0 + 3500

Combine like terms: -3500 + 3500 = 0
0 + 120x + x2 = 0 + 3500
120x + x2 = 0 + 3500

Combine like terms: 0 + 3500 = 3500
120x + x2 = 3500

The x term is 120x.  Take half its coefficient (60).
Square it (3600) and add it to both sides.

Add '3600' to each side of the equation.
120x + 3600 + x2 = 3500 + 3600

Reorder the terms:
3600 + 120x + x2 = 3500 + 3600

Combine like terms: 3500 + 3600 = 7100
3600 + 120x + x2 = 7100

Factor a perfect square on the left side:
(x + 60)(x + 60) = 7100

Calculate the square root of the right side: 84.261497732

Break this problem into two subproblems by setting 
(x + 60) equal to 84.261497732 and -84.261497732.

Subproblem 1

x + 60 = 84.261497732 Simplifying x + 60 = 84.261497732 Reorder the terms: 60 + x = 84.261497732 Solving 60 + x = 84.261497732 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-60' to each side of the equation. 60 + -60 + x = 84.261497732 + -60 Combine like terms: 60 + -60 = 0 0 + x = 84.261497732 + -60 x = 84.261497732 + -60 Combine like terms: 84.261497732 + -60 = 24.261497732 x = 24.261497732 Simplifying x = 24.261497732

Subproblem 2

x + 60 = -84.261497732 Simplifying x + 60 = -84.261497732 Reorder the terms: 60 + x = -84.261497732 Solving 60 + x = -84.261497732 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-60' to each side of the equation. 60 + -60 + x = -84.261497732 + -60 Combine like terms: 60 + -60 = 0 0 + x = -84.261497732 + -60 x = -84.261497732 + -60 Combine like terms: -84.261497732 + -60 = -144.261497732 x = -144.261497732 Simplifying x = -144.261497732

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.261497732, -144.261497732}

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