0.5x^2-5.5x+12=0

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Solution for 0.5x^2-5.5x+12=0 equation:


Simplifying
0.5x2 + -5.5x + 12 = 0

Reorder the terms:
12 + -5.5x + 0.5x2 = 0

Solving
12 + -5.5x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
24 + -11x + x2 = 0

Move the constant term to the right:

Add '-24' to each side of the equation.
24 + -11x + -24 + x2 = 0 + -24

Reorder the terms:
24 + -24 + -11x + x2 = 0 + -24

Combine like terms: 24 + -24 = 0
0 + -11x + x2 = 0 + -24
-11x + x2 = 0 + -24

Combine like terms: 0 + -24 = -24
-11x + x2 = -24

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = -24 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -24 + 30.25

Combine like terms: -24 + 30.25 = 6.25
30.25 + -11x + x2 = 6.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 6.25

Calculate the square root of the right side: 2.5

Break this problem into two subproblems by setting 
(x + -5.5) equal to 2.5 and -2.5.

Subproblem 1

x + -5.5 = 2.5 Simplifying x + -5.5 = 2.5 Reorder the terms: -5.5 + x = 2.5 Solving -5.5 + x = 2.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 2.5 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 2.5 + 5.5 x = 2.5 + 5.5 Combine like terms: 2.5 + 5.5 = 8 x = 8 Simplifying x = 8

Subproblem 2

x + -5.5 = -2.5 Simplifying x + -5.5 = -2.5 Reorder the terms: -5.5 + x = -2.5 Solving -5.5 + x = -2.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -2.5 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -2.5 + 5.5 x = -2.5 + 5.5 Combine like terms: -2.5 + 5.5 = 3 x = 3 Simplifying x = 3

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8, 3}

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