2x+2(9x-9)-2x^2=13-28-3x^2+10

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Solution for 2x+2(9x-9)-2x^2=13-28-3x^2+10 equation:


Simplifying
2x + 2(9x + -9) + -2x2 = 13 + -28 + -3x2 + 10

Reorder the terms:
2x + 2(-9 + 9x) + -2x2 = 13 + -28 + -3x2 + 10
2x + (-9 * 2 + 9x * 2) + -2x2 = 13 + -28 + -3x2 + 10
2x + (-18 + 18x) + -2x2 = 13 + -28 + -3x2 + 10

Reorder the terms:
-18 + 2x + 18x + -2x2 = 13 + -28 + -3x2 + 10

Combine like terms: 2x + 18x = 20x
-18 + 20x + -2x2 = 13 + -28 + -3x2 + 10

Reorder the terms:
-18 + 20x + -2x2 = 13 + -28 + 10 + -3x2

Combine like terms: 13 + -28 = -15
-18 + 20x + -2x2 = -15 + 10 + -3x2

Combine like terms: -15 + 10 = -5
-18 + 20x + -2x2 = -5 + -3x2

Solving
-18 + 20x + -2x2 = -5 + -3x2

Solving for variable 'x'.

Reorder the terms:
-18 + 5 + 20x + -2x2 + 3x2 = -5 + -3x2 + 5 + 3x2

Combine like terms: -18 + 5 = -13
-13 + 20x + -2x2 + 3x2 = -5 + -3x2 + 5 + 3x2

Combine like terms: -2x2 + 3x2 = 1x2
-13 + 20x + 1x2 = -5 + -3x2 + 5 + 3x2

Reorder the terms:
-13 + 20x + 1x2 = -5 + 5 + -3x2 + 3x2

Combine like terms: -5 + 5 = 0
-13 + 20x + 1x2 = 0 + -3x2 + 3x2
-13 + 20x + 1x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
-13 + 20x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + 20x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + 20x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 20x + x2 = 0 + 13
20x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
20x + x2 = 13

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = 13 + 100

Reorder the terms:
100 + 20x + x2 = 13 + 100

Combine like terms: 13 + 100 = 113
100 + 20x + x2 = 113

Factor a perfect square on the left side:
(x + 10)(x + 10) = 113

Calculate the square root of the right side: 10.630145813

Break this problem into two subproblems by setting 
(x + 10) equal to 10.630145813 and -10.630145813.

Subproblem 1

x + 10 = 10.630145813 Simplifying x + 10 = 10.630145813 Reorder the terms: 10 + x = 10.630145813 Solving 10 + x = 10.630145813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 10.630145813 + -10 Combine like terms: 10 + -10 = 0 0 + x = 10.630145813 + -10 x = 10.630145813 + -10 Combine like terms: 10.630145813 + -10 = 0.630145813 x = 0.630145813 Simplifying x = 0.630145813

Subproblem 2

x + 10 = -10.630145813 Simplifying x + 10 = -10.630145813 Reorder the terms: 10 + x = -10.630145813 Solving 10 + x = -10.630145813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -10.630145813 + -10 Combine like terms: 10 + -10 = 0 0 + x = -10.630145813 + -10 x = -10.630145813 + -10 Combine like terms: -10.630145813 + -10 = -20.630145813 x = -20.630145813 Simplifying x = -20.630145813

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.630145813, -20.630145813}

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