(100+x)(50+x)=84000

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Solution for (100+x)(50+x)=84000 equation:


Simplifying
(100 + x)(50 + x) = 84000

Multiply (100 + x) * (50 + x)
(100(50 + x) + x(50 + x)) = 84000
((50 * 100 + x * 100) + x(50 + x)) = 84000
((5000 + 100x) + x(50 + x)) = 84000
(5000 + 100x + (50 * x + x * x)) = 84000
(5000 + 100x + (50x + x2)) = 84000

Combine like terms: 100x + 50x = 150x
(5000 + 150x + x2) = 84000

Solving
5000 + 150x + x2 = 84000

Solving for variable 'x'.

Reorder the terms:
5000 + -84000 + 150x + x2 = 84000 + -84000

Combine like terms: 5000 + -84000 = -79000
-79000 + 150x + x2 = 84000 + -84000

Combine like terms: 84000 + -84000 = 0
-79000 + 150x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '79000' to each side of the equation.
-79000 + 150x + 79000 + x2 = 0 + 79000

Reorder the terms:
-79000 + 79000 + 150x + x2 = 0 + 79000

Combine like terms: -79000 + 79000 = 0
0 + 150x + x2 = 0 + 79000
150x + x2 = 0 + 79000

Combine like terms: 0 + 79000 = 79000
150x + x2 = 79000

The x term is 150x.  Take half its coefficient (75).
Square it (5625) and add it to both sides.

Add '5625' to each side of the equation.
150x + 5625 + x2 = 79000 + 5625

Reorder the terms:
5625 + 150x + x2 = 79000 + 5625

Combine like terms: 79000 + 5625 = 84625
5625 + 150x + x2 = 84625

Factor a perfect square on the left side:
(x + 75)(x + 75) = 84625

Calculate the square root of the right side: 290.903764156

Break this problem into two subproblems by setting 
(x + 75) equal to 290.903764156 and -290.903764156.

Subproblem 1

x + 75 = 290.903764156 Simplifying x + 75 = 290.903764156 Reorder the terms: 75 + x = 290.903764156 Solving 75 + x = 290.903764156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + x = 290.903764156 + -75 Combine like terms: 75 + -75 = 0 0 + x = 290.903764156 + -75 x = 290.903764156 + -75 Combine like terms: 290.903764156 + -75 = 215.903764156 x = 215.903764156 Simplifying x = 215.903764156

Subproblem 2

x + 75 = -290.903764156 Simplifying x + 75 = -290.903764156 Reorder the terms: 75 + x = -290.903764156 Solving 75 + x = -290.903764156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + x = -290.903764156 + -75 Combine like terms: 75 + -75 = 0 0 + x = -290.903764156 + -75 x = -290.903764156 + -75 Combine like terms: -290.903764156 + -75 = -365.903764156 x = -365.903764156 Simplifying x = -365.903764156

Solution

The solution to the problem is based on the solutions from the subproblems. x = {215.903764156, -365.903764156}

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