0=-2x^2+22x-17

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Solution for 0=-2x^2+22x-17 equation:


Simplifying
0 = -2x2 + 22x + -17

Reorder the terms:
0 = -17 + 22x + -2x2

Solving
0 = -17 + 22x + -2x2

Solving for variable 'x'.

Combine like terms: 0 + 17 = 17
17 + -22x + 2x2 = -17 + 22x + -2x2 + 17 + -22x + 2x2

Reorder the terms:
17 + -22x + 2x2 = -17 + 17 + 22x + -22x + -2x2 + 2x2

Combine like terms: -17 + 17 = 0
17 + -22x + 2x2 = 0 + 22x + -22x + -2x2 + 2x2
17 + -22x + 2x2 = 22x + -22x + -2x2 + 2x2

Combine like terms: 22x + -22x = 0
17 + -22x + 2x2 = 0 + -2x2 + 2x2
17 + -22x + 2x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
17 + -22x + 2x2 = 0

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

Divide each side by '2'.
8.5 + -11x + x2 = 0

Move the constant term to the right:

Add '-8.5' to each side of the equation.
8.5 + -11x + -8.5 + x2 = 0 + -8.5

Reorder the terms:
8.5 + -8.5 + -11x + x2 = 0 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
0.0 + -11x + x2 = 0 + -8.5
-11x + x2 = 0 + -8.5

Combine like terms: 0 + -8.5 = -8.5
-11x + x2 = -8.5

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 = -8.5 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -8.5 + 30.25

Combine like terms: -8.5 + 30.25 = 21.75
30.25 + -11x + x2 = 21.75

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 21.75

Calculate the square root of the right side: 4.663689527

Break this problem into two subproblems by setting 
(x + -5.5) equal to 4.663689527 and -4.663689527.

Subproblem 1

x + -5.5 = 4.663689527 Simplifying x + -5.5 = 4.663689527 Reorder the terms: -5.5 + x = 4.663689527 Solving -5.5 + x = 4.663689527 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 = 4.663689527 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 4.663689527 + 5.5 x = 4.663689527 + 5.5 Combine like terms: 4.663689527 + 5.5 = 10.163689527 x = 10.163689527 Simplifying x = 10.163689527

Subproblem 2

x + -5.5 = -4.663689527 Simplifying x + -5.5 = -4.663689527 Reorder the terms: -5.5 + x = -4.663689527 Solving -5.5 + x = -4.663689527 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 = -4.663689527 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -4.663689527 + 5.5 x = -4.663689527 + 5.5 Combine like terms: -4.663689527 + 5.5 = 0.836310473 x = 0.836310473 Simplifying x = 0.836310473

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.163689527, 0.836310473}

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