25*(36+x^2)=-16*(200-40*x-x^2)

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Solution for 25*(36+x^2)=-16*(200-40*x-x^2) equation:


Simplifying
25(36 + x2) = -16(200 + -40x + -1x2)
(36 * 25 + x2 * 25) = -16(200 + -40x + -1x2)
(900 + 25x2) = -16(200 + -40x + -1x2)
900 + 25x2 = (200 * -16 + -40x * -16 + -1x2 * -16)
900 + 25x2 = (-3200 + 640x + 16x2)

Solving
900 + 25x2 = -3200 + 640x + 16x2

Solving for variable 'x'.

Reorder the terms:
900 + 3200 + -640x + 25x2 + -16x2 = -3200 + 640x + 16x2 + 3200 + -640x + -16x2

Combine like terms: 900 + 3200 = 4100
4100 + -640x + 25x2 + -16x2 = -3200 + 640x + 16x2 + 3200 + -640x + -16x2

Combine like terms: 25x2 + -16x2 = 9x2
4100 + -640x + 9x2 = -3200 + 640x + 16x2 + 3200 + -640x + -16x2

Reorder the terms:
4100 + -640x + 9x2 = -3200 + 3200 + 640x + -640x + 16x2 + -16x2

Combine like terms: -3200 + 3200 = 0
4100 + -640x + 9x2 = 0 + 640x + -640x + 16x2 + -16x2
4100 + -640x + 9x2 = 640x + -640x + 16x2 + -16x2

Combine like terms: 640x + -640x = 0
4100 + -640x + 9x2 = 0 + 16x2 + -16x2
4100 + -640x + 9x2 = 16x2 + -16x2

Combine like terms: 16x2 + -16x2 = 0
4100 + -640x + 9x2 = 0

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
455.5555556 + -71.11111111x + x2 = 0

Move the constant term to the right:

Add '-455.5555556' to each side of the equation.
455.5555556 + -71.11111111x + -455.5555556 + x2 = 0 + -455.5555556

Reorder the terms:
455.5555556 + -455.5555556 + -71.11111111x + x2 = 0 + -455.5555556

Combine like terms: 455.5555556 + -455.5555556 = 0.0000000
0.0000000 + -71.11111111x + x2 = 0 + -455.5555556
-71.11111111x + x2 = 0 + -455.5555556

Combine like terms: 0 + -455.5555556 = -455.5555556
-71.11111111x + x2 = -455.5555556

The x term is -71.11111111x.  Take half its coefficient (-35.55555556).
Square it (1264.197531) and add it to both sides.

Add '1264.197531' to each side of the equation.
-71.11111111x + 1264.197531 + x2 = -455.5555556 + 1264.197531

Reorder the terms:
1264.197531 + -71.11111111x + x2 = -455.5555556 + 1264.197531

Combine like terms: -455.5555556 + 1264.197531 = 808.6419754
1264.197531 + -71.11111111x + x2 = 808.6419754

Factor a perfect square on the left side:
(x + -35.55555556)(x + -35.55555556) = 808.6419754

Calculate the square root of the right side: 28.436630873

Break this problem into two subproblems by setting 
(x + -35.55555556) equal to 28.436630873 and -28.436630873.

Subproblem 1

x + -35.55555556 = 28.436630873 Simplifying x + -35.55555556 = 28.436630873 Reorder the terms: -35.55555556 + x = 28.436630873 Solving -35.55555556 + x = 28.436630873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35.55555556' to each side of the equation. -35.55555556 + 35.55555556 + x = 28.436630873 + 35.55555556 Combine like terms: -35.55555556 + 35.55555556 = 0.00000000 0.00000000 + x = 28.436630873 + 35.55555556 x = 28.436630873 + 35.55555556 Combine like terms: 28.436630873 + 35.55555556 = 63.992186433 x = 63.992186433 Simplifying x = 63.992186433

Subproblem 2

x + -35.55555556 = -28.436630873 Simplifying x + -35.55555556 = -28.436630873 Reorder the terms: -35.55555556 + x = -28.436630873 Solving -35.55555556 + x = -28.436630873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35.55555556' to each side of the equation. -35.55555556 + 35.55555556 + x = -28.436630873 + 35.55555556 Combine like terms: -35.55555556 + 35.55555556 = 0.00000000 0.00000000 + x = -28.436630873 + 35.55555556 x = -28.436630873 + 35.55555556 Combine like terms: -28.436630873 + 35.55555556 = 7.118924687 x = 7.118924687 Simplifying x = 7.118924687

Solution

The solution to the problem is based on the solutions from the subproblems. x = {63.992186433, 7.118924687}

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