5.6=5.6x^2+5.6x+x

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Solution for 5.6=5.6x^2+5.6x+x equation:


Simplifying
5.6 = 5.6x2 + 5.6x + x

Reorder the terms:
5.6 = 5.6x + x + 5.6x2

Combine like terms: 5.6x + x = 6.6x
5.6 = 6.6x + 5.6x2

Solving
5.6 = 6.6x + 5.6x2

Solving for variable 'x'.

Reorder the terms:
5.6 + -6.6x + -5.6x2 = 6.6x + -6.6x + 5.6x2 + -5.6x2

Combine like terms: 6.6x + -6.6x = 0.0
5.6 + -6.6x + -5.6x2 = 0.0 + 5.6x2 + -5.6x2
5.6 + -6.6x + -5.6x2 = 5.6x2 + -5.6x2

Combine like terms: 5.6x2 + -5.6x2 = 0.0
5.6 + -6.6x + -5.6x2 = 0.0

Begin completing the square.  Divide all terms by
-5.6 the coefficient of the squared term: 

Divide each side by '-5.6'.
-1 + 1.178571429x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 1.178571429x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 1.178571429x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 1.178571429x + x2 = 0 + 1
1.178571429x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
1.178571429x + x2 = 1

The x term is 1.178571429x.  Take half its coefficient (0.5892857145).
Square it (0.3472576533) and add it to both sides.

Add '0.3472576533' to each side of the equation.
1.178571429x + 0.3472576533 + x2 = 1 + 0.3472576533

Reorder the terms:
0.3472576533 + 1.178571429x + x2 = 1 + 0.3472576533

Combine like terms: 1 + 0.3472576533 = 1.3472576533
0.3472576533 + 1.178571429x + x2 = 1.3472576533

Factor a perfect square on the left side:
(x + 0.5892857145)(x + 0.5892857145) = 1.3472576533

Calculate the square root of the right side: 1.160714286

Break this problem into two subproblems by setting 
(x + 0.5892857145) equal to 1.160714286 and -1.160714286.

Subproblem 1

x + 0.5892857145 = 1.160714286 Simplifying x + 0.5892857145 = 1.160714286 Reorder the terms: 0.5892857145 + x = 1.160714286 Solving 0.5892857145 + x = 1.160714286 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5892857145' to each side of the equation. 0.5892857145 + -0.5892857145 + x = 1.160714286 + -0.5892857145 Combine like terms: 0.5892857145 + -0.5892857145 = 0.0000000000 0.0000000000 + x = 1.160714286 + -0.5892857145 x = 1.160714286 + -0.5892857145 Combine like terms: 1.160714286 + -0.5892857145 = 0.5714285715 x = 0.5714285715 Simplifying x = 0.5714285715

Subproblem 2

x + 0.5892857145 = -1.160714286 Simplifying x + 0.5892857145 = -1.160714286 Reorder the terms: 0.5892857145 + x = -1.160714286 Solving 0.5892857145 + x = -1.160714286 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5892857145' to each side of the equation. 0.5892857145 + -0.5892857145 + x = -1.160714286 + -0.5892857145 Combine like terms: 0.5892857145 + -0.5892857145 = 0.0000000000 0.0000000000 + x = -1.160714286 + -0.5892857145 x = -1.160714286 + -0.5892857145 Combine like terms: -1.160714286 + -0.5892857145 = -1.7500000005 x = -1.7500000005 Simplifying x = -1.7500000005

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5714285715, -1.7500000005}

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