5x^2=2.2x^2+5.88x+3.168

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Solution for 5x^2=2.2x^2+5.88x+3.168 equation:


Simplifying
5x2 = 2.2x2 + 5.88x + 3.168

Reorder the terms:
5x2 = 3.168 + 5.88x + 2.2x2

Solving
5x2 = 3.168 + 5.88x + 2.2x2

Solving for variable 'x'.

Reorder the terms:
-3.168 + -5.88x + 5x2 + -2.2x2 = 3.168 + 5.88x + 2.2x2 + -3.168 + -5.88x + -2.2x2

Combine like terms: 5x2 + -2.2x2 = 2.8x2
-3.168 + -5.88x + 2.8x2 = 3.168 + 5.88x + 2.2x2 + -3.168 + -5.88x + -2.2x2

Reorder the terms:
-3.168 + -5.88x + 2.8x2 = 3.168 + -3.168 + 5.88x + -5.88x + 2.2x2 + -2.2x2

Combine like terms: 3.168 + -3.168 = 0.000
-3.168 + -5.88x + 2.8x2 = 0.000 + 5.88x + -5.88x + 2.2x2 + -2.2x2
-3.168 + -5.88x + 2.8x2 = 5.88x + -5.88x + 2.2x2 + -2.2x2

Combine like terms: 5.88x + -5.88x = 0.00
-3.168 + -5.88x + 2.8x2 = 0.00 + 2.2x2 + -2.2x2
-3.168 + -5.88x + 2.8x2 = 2.2x2 + -2.2x2

Combine like terms: 2.2x2 + -2.2x2 = 0.0
-3.168 + -5.88x + 2.8x2 = 0.0

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

Divide each side by '2.8'.
-1.131428571 + -2.1x + x2 = 0

Move the constant term to the right:

Add '1.131428571' to each side of the equation.
-1.131428571 + -2.1x + 1.131428571 + x2 = 0 + 1.131428571

Reorder the terms:
-1.131428571 + 1.131428571 + -2.1x + x2 = 0 + 1.131428571

Combine like terms: -1.131428571 + 1.131428571 = 0.000000000
0.000000000 + -2.1x + x2 = 0 + 1.131428571
-2.1x + x2 = 0 + 1.131428571

Combine like terms: 0 + 1.131428571 = 1.131428571
-2.1x + x2 = 1.131428571

The x term is -2.1x.  Take half its coefficient (-1.05).
Square it (1.1025) and add it to both sides.

Add '1.1025' to each side of the equation.
-2.1x + 1.1025 + x2 = 1.131428571 + 1.1025

Reorder the terms:
1.1025 + -2.1x + x2 = 1.131428571 + 1.1025

Combine like terms: 1.131428571 + 1.1025 = 2.233928571
1.1025 + -2.1x + x2 = 2.233928571

Factor a perfect square on the left side:
(x + -1.05)(x + -1.05) = 2.233928571

Calculate the square root of the right side: 1.494633256

Break this problem into two subproblems by setting 
(x + -1.05) equal to 1.494633256 and -1.494633256.

Subproblem 1

x + -1.05 = 1.494633256 Simplifying x + -1.05 = 1.494633256 Reorder the terms: -1.05 + x = 1.494633256 Solving -1.05 + x = 1.494633256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.05' to each side of the equation. -1.05 + 1.05 + x = 1.494633256 + 1.05 Combine like terms: -1.05 + 1.05 = 0.00 0.00 + x = 1.494633256 + 1.05 x = 1.494633256 + 1.05 Combine like terms: 1.494633256 + 1.05 = 2.544633256 x = 2.544633256 Simplifying x = 2.544633256

Subproblem 2

x + -1.05 = -1.494633256 Simplifying x + -1.05 = -1.494633256 Reorder the terms: -1.05 + x = -1.494633256 Solving -1.05 + x = -1.494633256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.05' to each side of the equation. -1.05 + 1.05 + x = -1.494633256 + 1.05 Combine like terms: -1.05 + 1.05 = 0.00 0.00 + x = -1.494633256 + 1.05 x = -1.494633256 + 1.05 Combine like terms: -1.494633256 + 1.05 = -0.444633256 x = -0.444633256 Simplifying x = -0.444633256

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.544633256, -0.444633256}

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