(x+20)(x+30)=5000

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Solution for (x+20)(x+30)=5000 equation:


Simplifying
(x + 20)(x + 30) = 5000

Reorder the terms:
(20 + x)(x + 30) = 5000

Reorder the terms:
(20 + x)(30 + x) = 5000

Multiply (20 + x) * (30 + x)
(20(30 + x) + x(30 + x)) = 5000
((30 * 20 + x * 20) + x(30 + x)) = 5000
((600 + 20x) + x(30 + x)) = 5000
(600 + 20x + (30 * x + x * x)) = 5000
(600 + 20x + (30x + x2)) = 5000

Combine like terms: 20x + 30x = 50x
(600 + 50x + x2) = 5000

Solving
600 + 50x + x2 = 5000

Solving for variable 'x'.

Reorder the terms:
600 + -5000 + 50x + x2 = 5000 + -5000

Combine like terms: 600 + -5000 = -4400
-4400 + 50x + x2 = 5000 + -5000

Combine like terms: 5000 + -5000 = 0
-4400 + 50x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4400' to each side of the equation.
-4400 + 50x + 4400 + x2 = 0 + 4400

Reorder the terms:
-4400 + 4400 + 50x + x2 = 0 + 4400

Combine like terms: -4400 + 4400 = 0
0 + 50x + x2 = 0 + 4400
50x + x2 = 0 + 4400

Combine like terms: 0 + 4400 = 4400
50x + x2 = 4400

The x term is 50x.  Take half its coefficient (25).
Square it (625) and add it to both sides.

Add '625' to each side of the equation.
50x + 625 + x2 = 4400 + 625

Reorder the terms:
625 + 50x + x2 = 4400 + 625

Combine like terms: 4400 + 625 = 5025
625 + 50x + x2 = 5025

Factor a perfect square on the left side:
(x + 25)(x + 25) = 5025

Calculate the square root of the right side: 70.887234394

Break this problem into two subproblems by setting 
(x + 25) equal to 70.887234394 and -70.887234394.

Subproblem 1

x + 25 = 70.887234394 Simplifying x + 25 = 70.887234394 Reorder the terms: 25 + x = 70.887234394 Solving 25 + x = 70.887234394 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + x = 70.887234394 + -25 Combine like terms: 25 + -25 = 0 0 + x = 70.887234394 + -25 x = 70.887234394 + -25 Combine like terms: 70.887234394 + -25 = 45.887234394 x = 45.887234394 Simplifying x = 45.887234394

Subproblem 2

x + 25 = -70.887234394 Simplifying x + 25 = -70.887234394 Reorder the terms: 25 + x = -70.887234394 Solving 25 + x = -70.887234394 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + x = -70.887234394 + -25 Combine like terms: 25 + -25 = 0 0 + x = -70.887234394 + -25 x = -70.887234394 + -25 Combine like terms: -70.887234394 + -25 = -95.887234394 x = -95.887234394 Simplifying x = -95.887234394

Solution

The solution to the problem is based on the solutions from the subproblems. x = {45.887234394, -95.887234394}

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