2x^2-22x+28.5=0

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Solution for 2x^2-22x+28.5=0 equation:


Simplifying
2x2 + -22x + 28.5 = 0

Reorder the terms:
28.5 + -22x + 2x2 = 0

Solving
28.5 + -22x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
14.25 + -11x + x2 = 0

Move the constant term to the right:

Add '-14.25' to each side of the equation.
14.25 + -11x + -14.25 + x2 = 0 + -14.25

Reorder the terms:
14.25 + -14.25 + -11x + x2 = 0 + -14.25

Combine like terms: 14.25 + -14.25 = 0.00
0.00 + -11x + x2 = 0 + -14.25
-11x + x2 = 0 + -14.25

Combine like terms: 0 + -14.25 = -14.25
-11x + x2 = -14.25

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 = -14.25 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -14.25 + 30.25

Combine like terms: -14.25 + 30.25 = 16
30.25 + -11x + x2 = 16

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 16

Calculate the square root of the right side: 4

Break this problem into two subproblems by setting 
(x + -5.5) equal to 4 and -4.

Subproblem 1

x + -5.5 = 4 Simplifying x + -5.5 = 4 Reorder the terms: -5.5 + x = 4 Solving -5.5 + x = 4 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 = 4 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 4 + 5.5 x = 4 + 5.5 Combine like terms: 4 + 5.5 = 9.5 x = 9.5 Simplifying x = 9.5

Subproblem 2

x + -5.5 = -4 Simplifying x + -5.5 = -4 Reorder the terms: -5.5 + x = -4 Solving -5.5 + x = -4 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 = -4 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -4 + 5.5 x = -4 + 5.5 Combine like terms: -4 + 5.5 = 1.5 x = 1.5 Simplifying x = 1.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.5, 1.5}

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