(x+130)(x+500)=3125

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Solution for (x+130)(x+500)=3125 equation:


Simplifying
(x + 130)(x + 500) = 3125

Reorder the terms:
(130 + x)(x + 500) = 3125

Reorder the terms:
(130 + x)(500 + x) = 3125

Multiply (130 + x) * (500 + x)
(130(500 + x) + x(500 + x)) = 3125
((500 * 130 + x * 130) + x(500 + x)) = 3125
((65000 + 130x) + x(500 + x)) = 3125
(65000 + 130x + (500 * x + x * x)) = 3125
(65000 + 130x + (500x + x2)) = 3125

Combine like terms: 130x + 500x = 630x
(65000 + 630x + x2) = 3125

Solving
65000 + 630x + x2 = 3125

Solving for variable 'x'.

Reorder the terms:
65000 + -3125 + 630x + x2 = 3125 + -3125

Combine like terms: 65000 + -3125 = 61875
61875 + 630x + x2 = 3125 + -3125

Combine like terms: 3125 + -3125 = 0
61875 + 630x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-61875' to each side of the equation.
61875 + 630x + -61875 + x2 = 0 + -61875

Reorder the terms:
61875 + -61875 + 630x + x2 = 0 + -61875

Combine like terms: 61875 + -61875 = 0
0 + 630x + x2 = 0 + -61875
630x + x2 = 0 + -61875

Combine like terms: 0 + -61875 = -61875
630x + x2 = -61875

The x term is 630x.  Take half its coefficient (315).
Square it (99225) and add it to both sides.

Add '99225' to each side of the equation.
630x + 99225 + x2 = -61875 + 99225

Reorder the terms:
99225 + 630x + x2 = -61875 + 99225

Combine like terms: -61875 + 99225 = 37350
99225 + 630x + x2 = 37350

Factor a perfect square on the left side:
(x + 315)(x + 315) = 37350

Calculate the square root of the right side: 193.261480901

Break this problem into two subproblems by setting 
(x + 315) equal to 193.261480901 and -193.261480901.

Subproblem 1

x + 315 = 193.261480901 Simplifying x + 315 = 193.261480901 Reorder the terms: 315 + x = 193.261480901 Solving 315 + x = 193.261480901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-315' to each side of the equation. 315 + -315 + x = 193.261480901 + -315 Combine like terms: 315 + -315 = 0 0 + x = 193.261480901 + -315 x = 193.261480901 + -315 Combine like terms: 193.261480901 + -315 = -121.738519099 x = -121.738519099 Simplifying x = -121.738519099

Subproblem 2

x + 315 = -193.261480901 Simplifying x + 315 = -193.261480901 Reorder the terms: 315 + x = -193.261480901 Solving 315 + x = -193.261480901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-315' to each side of the equation. 315 + -315 + x = -193.261480901 + -315 Combine like terms: 315 + -315 = 0 0 + x = -193.261480901 + -315 x = -193.261480901 + -315 Combine like terms: -193.261480901 + -315 = -508.261480901 x = -508.261480901 Simplifying x = -508.261480901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-121.738519099, -508.261480901}

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