(3-11x-4x^2)-(5x^2+12x-4)=

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Solution for (3-11x-4x^2)-(5x^2+12x-4)= equation:


Simplifying
(3 + -11x + -4x2) + -1(5x2 + 12x + -4) = 0

Remove parenthesis around (3 + -11x + -4x2)
3 + -11x + -4x2 + -1(5x2 + 12x + -4) = 0

Reorder the terms:
3 + -11x + -4x2 + -1(-4 + 12x + 5x2) = 0
3 + -11x + -4x2 + (-4 * -1 + 12x * -1 + 5x2 * -1) = 0
3 + -11x + -4x2 + (4 + -12x + -5x2) = 0

Reorder the terms:
3 + 4 + -11x + -12x + -4x2 + -5x2 = 0

Combine like terms: 3 + 4 = 7
7 + -11x + -12x + -4x2 + -5x2 = 0

Combine like terms: -11x + -12x = -23x
7 + -23x + -4x2 + -5x2 = 0

Combine like terms: -4x2 + -5x2 = -9x2
7 + -23x + -9x2 = 0

Solving
7 + -23x + -9x2 = 0

Solving for variable 'x'.

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

Divide each side by '-9'.
-0.7777777778 + 2.555555556x + x2 = 0

Move the constant term to the right:

Add '0.7777777778' to each side of the equation.
-0.7777777778 + 2.555555556x + 0.7777777778 + x2 = 0 + 0.7777777778

Reorder the terms:
-0.7777777778 + 0.7777777778 + 2.555555556x + x2 = 0 + 0.7777777778

Combine like terms: -0.7777777778 + 0.7777777778 = 0.0000000000
0.0000000000 + 2.555555556x + x2 = 0 + 0.7777777778
2.555555556x + x2 = 0 + 0.7777777778

Combine like terms: 0 + 0.7777777778 = 0.7777777778
2.555555556x + x2 = 0.7777777778

The x term is 2.555555556x.  Take half its coefficient (1.277777778).
Square it (1.632716050) and add it to both sides.

Add '1.632716050' to each side of the equation.
2.555555556x + 1.632716050 + x2 = 0.7777777778 + 1.632716050

Reorder the terms:
1.632716050 + 2.555555556x + x2 = 0.7777777778 + 1.632716050

Combine like terms: 0.7777777778 + 1.632716050 = 2.4104938278
1.632716050 + 2.555555556x + x2 = 2.4104938278

Factor a perfect square on the left side:
(x + 1.277777778)(x + 1.277777778) = 2.4104938278

Calculate the square root of the right side: 1.552576513

Break this problem into two subproblems by setting 
(x + 1.277777778) equal to 1.552576513 and -1.552576513.

Subproblem 1

x + 1.277777778 = 1.552576513 Simplifying x + 1.277777778 = 1.552576513 Reorder the terms: 1.277777778 + x = 1.552576513 Solving 1.277777778 + x = 1.552576513 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = 1.552576513 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = 1.552576513 + -1.277777778 x = 1.552576513 + -1.277777778 Combine like terms: 1.552576513 + -1.277777778 = 0.274798735 x = 0.274798735 Simplifying x = 0.274798735

Subproblem 2

x + 1.277777778 = -1.552576513 Simplifying x + 1.277777778 = -1.552576513 Reorder the terms: 1.277777778 + x = -1.552576513 Solving 1.277777778 + x = -1.552576513 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = -1.552576513 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = -1.552576513 + -1.277777778 x = -1.552576513 + -1.277777778 Combine like terms: -1.552576513 + -1.277777778 = -2.830354291 x = -2.830354291 Simplifying x = -2.830354291

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.274798735, -2.830354291}

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