(140+x)(90+x)=3654

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Solution for (140+x)(90+x)=3654 equation:


Simplifying
(140 + x)(90 + x) = 3654

Multiply (140 + x) * (90 + x)
(140(90 + x) + x(90 + x)) = 3654
((90 * 140 + x * 140) + x(90 + x)) = 3654
((12600 + 140x) + x(90 + x)) = 3654
(12600 + 140x + (90 * x + x * x)) = 3654
(12600 + 140x + (90x + x2)) = 3654

Combine like terms: 140x + 90x = 230x
(12600 + 230x + x2) = 3654

Solving
12600 + 230x + x2 = 3654

Solving for variable 'x'.

Reorder the terms:
12600 + -3654 + 230x + x2 = 3654 + -3654

Combine like terms: 12600 + -3654 = 8946
8946 + 230x + x2 = 3654 + -3654

Combine like terms: 3654 + -3654 = 0
8946 + 230x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-8946' to each side of the equation.
8946 + 230x + -8946 + x2 = 0 + -8946

Reorder the terms:
8946 + -8946 + 230x + x2 = 0 + -8946

Combine like terms: 8946 + -8946 = 0
0 + 230x + x2 = 0 + -8946
230x + x2 = 0 + -8946

Combine like terms: 0 + -8946 = -8946
230x + x2 = -8946

The x term is 230x.  Take half its coefficient (115).
Square it (13225) and add it to both sides.

Add '13225' to each side of the equation.
230x + 13225 + x2 = -8946 + 13225

Reorder the terms:
13225 + 230x + x2 = -8946 + 13225

Combine like terms: -8946 + 13225 = 4279
13225 + 230x + x2 = 4279

Factor a perfect square on the left side:
(x + 115)(x + 115) = 4279

Calculate the square root of the right side: 65.414065766

Break this problem into two subproblems by setting 
(x + 115) equal to 65.414065766 and -65.414065766.

Subproblem 1

x + 115 = 65.414065766 Simplifying x + 115 = 65.414065766 Reorder the terms: 115 + x = 65.414065766 Solving 115 + x = 65.414065766 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-115' to each side of the equation. 115 + -115 + x = 65.414065766 + -115 Combine like terms: 115 + -115 = 0 0 + x = 65.414065766 + -115 x = 65.414065766 + -115 Combine like terms: 65.414065766 + -115 = -49.585934234 x = -49.585934234 Simplifying x = -49.585934234

Subproblem 2

x + 115 = -65.414065766 Simplifying x + 115 = -65.414065766 Reorder the terms: 115 + x = -65.414065766 Solving 115 + x = -65.414065766 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-115' to each side of the equation. 115 + -115 + x = -65.414065766 + -115 Combine like terms: 115 + -115 = 0 0 + x = -65.414065766 + -115 x = -65.414065766 + -115 Combine like terms: -65.414065766 + -115 = -180.414065766 x = -180.414065766 Simplifying x = -180.414065766

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-49.585934234, -180.414065766}

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