0.2x^2-1.1x+0.5=0

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Solution for 0.2x^2-1.1x+0.5=0 equation:


Simplifying
0.2x2 + -1.1x + 0.5 = 0

Reorder the terms:
0.5 + -1.1x + 0.2x2 = 0

Solving
0.5 + -1.1x + 0.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.2'.
2.5 + -5.5x + x2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -5.5x + -2.5 + x2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -5.5x + x2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -5.5x + x2 = 0 + -2.5
-5.5x + x2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-5.5x + x2 = -2.5

The x term is -5.5x.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5x + 7.5625 + x2 = -2.5 + 7.5625

Reorder the terms:
7.5625 + -5.5x + x2 = -2.5 + 7.5625

Combine like terms: -2.5 + 7.5625 = 5.0625
7.5625 + -5.5x + x2 = 5.0625

Factor a perfect square on the left side:
(x + -2.75)(x + -2.75) = 5.0625

Calculate the square root of the right side: 2.25

Break this problem into two subproblems by setting 
(x + -2.75) equal to 2.25 and -2.25.

Subproblem 1

x + -2.75 = 2.25 Simplifying x + -2.75 = 2.25 Reorder the terms: -2.75 + x = 2.25 Solving -2.75 + x = 2.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = 2.25 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = 2.25 + 2.75 x = 2.25 + 2.75 Combine like terms: 2.25 + 2.75 = 5 x = 5 Simplifying x = 5

Subproblem 2

x + -2.75 = -2.25 Simplifying x + -2.75 = -2.25 Reorder the terms: -2.75 + x = -2.25 Solving -2.75 + x = -2.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = -2.25 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = -2.25 + 2.75 x = -2.25 + 2.75 Combine like terms: -2.25 + 2.75 = 0.5 x = 0.5 Simplifying x = 0.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5, 0.5}

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