2x^2+x=1.08

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Solution for 2x^2+x=1.08 equation:


Simplifying
2x2 + x = 1.08

Reorder the terms:
x + 2x2 = 1.08

Solving
x + 2x2 = 1.08

Solving for variable 'x'.

Reorder the terms:
-1.08 + x + 2x2 = 1.08 + -1.08

Combine like terms: 1.08 + -1.08 = 0.00
-1.08 + x + 2x2 = 0.00

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

Divide each side by '2'.
-0.54 + 0.5x + x2 = 0.00

Move the constant term to the right:

Add '0.54' to each side of the equation.
-0.54 + 0.5x + 0.54 + x2 = 0.00 + 0.54

Reorder the terms:
-0.54 + 0.54 + 0.5x + x2 = 0.00 + 0.54

Combine like terms: -0.54 + 0.54 = 0.00
0.00 + 0.5x + x2 = 0.00 + 0.54
0.5x + x2 = 0.00 + 0.54

Combine like terms: 0.00 + 0.54 = 0.54
0.5x + x2 = 0.54

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.5x + 0.25 + x2 = 0.54 + 0.25

Reorder the terms:
0.25 + 0.5x + x2 = 0.54 + 0.25

Combine like terms: 0.54 + 0.25 = 0.79
0.25 + 0.5x + x2 = 0.79

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.79

Calculate the square root of the right side: 0.888819442

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.888819442 and -0.888819442.

Subproblem 1

x + 0.5 = 0.888819442 Simplifying x + 0.5 = 0.888819442 Reorder the terms: 0.5 + x = 0.888819442 Solving 0.5 + x = 0.888819442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.888819442 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.888819442 + -0.5 x = 0.888819442 + -0.5 Combine like terms: 0.888819442 + -0.5 = 0.388819442 x = 0.388819442 Simplifying x = 0.388819442

Subproblem 2

x + 0.5 = -0.888819442 Simplifying x + 0.5 = -0.888819442 Reorder the terms: 0.5 + x = -0.888819442 Solving 0.5 + x = -0.888819442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.888819442 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.888819442 + -0.5 x = -0.888819442 + -0.5 Combine like terms: -0.888819442 + -0.5 = -1.388819442 x = -1.388819442 Simplifying x = -1.388819442

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.388819442, -1.388819442}

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