(5x^2-4x-52)+(4x^2+8x)=

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Solution for (5x^2-4x-52)+(4x^2+8x)= equation:


Simplifying
(5x2 + -4x + -52) + (4x2 + 8x) = 0

Reorder the terms:
(-52 + -4x + 5x2) + (4x2 + 8x) = 0

Remove parenthesis around (-52 + -4x + 5x2)
-52 + -4x + 5x2 + (4x2 + 8x) = 0

Reorder the terms:
-52 + -4x + 5x2 + (8x + 4x2) = 0

Remove parenthesis around (8x + 4x2)
-52 + -4x + 5x2 + 8x + 4x2 = 0

Reorder the terms:
-52 + -4x + 8x + 5x2 + 4x2 = 0

Combine like terms: -4x + 8x = 4x
-52 + 4x + 5x2 + 4x2 = 0

Combine like terms: 5x2 + 4x2 = 9x2
-52 + 4x + 9x2 = 0

Solving
-52 + 4x + 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'.
-5.777777778 + 0.4444444444x + x2 = 0

Move the constant term to the right:

Add '5.777777778' to each side of the equation.
-5.777777778 + 0.4444444444x + 5.777777778 + x2 = 0 + 5.777777778

Reorder the terms:
-5.777777778 + 5.777777778 + 0.4444444444x + x2 = 0 + 5.777777778

Combine like terms: -5.777777778 + 5.777777778 = 0.000000000
0.000000000 + 0.4444444444x + x2 = 0 + 5.777777778
0.4444444444x + x2 = 0 + 5.777777778

Combine like terms: 0 + 5.777777778 = 5.777777778
0.4444444444x + x2 = 5.777777778

The x term is 0.4444444444x.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444x + 0.04938271604 + x2 = 5.777777778 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444x + x2 = 5.777777778 + 0.04938271604

Combine like terms: 5.777777778 + 0.04938271604 = 5.82716049404
0.04938271604 + 0.4444444444x + x2 = 5.82716049404

Factor a perfect square on the left side:
(x + 0.2222222222)(x + 0.2222222222) = 5.82716049404

Calculate the square root of the right side: 2.41395122

Break this problem into two subproblems by setting 
(x + 0.2222222222) equal to 2.41395122 and -2.41395122.

Subproblem 1

x + 0.2222222222 = 2.41395122 Simplifying x + 0.2222222222 = 2.41395122 Reorder the terms: 0.2222222222 + x = 2.41395122 Solving 0.2222222222 + x = 2.41395122 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = 2.41395122 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = 2.41395122 + -0.2222222222 x = 2.41395122 + -0.2222222222 Combine like terms: 2.41395122 + -0.2222222222 = 2.1917289978 x = 2.1917289978 Simplifying x = 2.1917289978

Subproblem 2

x + 0.2222222222 = -2.41395122 Simplifying x + 0.2222222222 = -2.41395122 Reorder the terms: 0.2222222222 + x = -2.41395122 Solving 0.2222222222 + x = -2.41395122 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = -2.41395122 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = -2.41395122 + -0.2222222222 x = -2.41395122 + -0.2222222222 Combine like terms: -2.41395122 + -0.2222222222 = -2.6361734422 x = -2.6361734422 Simplifying x = -2.6361734422

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1917289978, -2.6361734422}

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