18=x^2-2x+1

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Solution for 18=x^2-2x+1 equation:


Simplifying
18 = x2 + -2x + 1

Reorder the terms:
18 = 1 + -2x + x2

Solving
18 = 1 + -2x + x2

Solving for variable 'x'.

Combine like terms: 18 + -1 = 17
17 + 2x + -1x2 = 1 + -2x + x2 + -1 + 2x + -1x2

Reorder the terms:
17 + 2x + -1x2 = 1 + -1 + -2x + 2x + x2 + -1x2

Combine like terms: 1 + -1 = 0
17 + 2x + -1x2 = 0 + -2x + 2x + x2 + -1x2
17 + 2x + -1x2 = -2x + 2x + x2 + -1x2

Combine like terms: -2x + 2x = 0
17 + 2x + -1x2 = 0 + x2 + -1x2
17 + 2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
17 + 2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-17 + -2x + x2 = 0

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -2x + 17 + x2 = 0 + 17

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

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

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

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 17 + 1

Reorder the terms:
1 + -2x + x2 = 17 + 1

Combine like terms: 17 + 1 = 18
1 + -2x + x2 = 18

Factor a perfect square on the left side:
(x + -1)(x + -1) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(x + -1) equal to 4.242640687 and -4.242640687.

Subproblem 1

x + -1 = 4.242640687 Simplifying x + -1 = 4.242640687 Reorder the terms: -1 + x = 4.242640687 Solving -1 + x = 4.242640687 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 4.242640687 + 1 Combine like terms: -1 + 1 = 0 0 + x = 4.242640687 + 1 x = 4.242640687 + 1 Combine like terms: 4.242640687 + 1 = 5.242640687 x = 5.242640687 Simplifying x = 5.242640687

Subproblem 2

x + -1 = -4.242640687 Simplifying x + -1 = -4.242640687 Reorder the terms: -1 + x = -4.242640687 Solving -1 + x = -4.242640687 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -4.242640687 + 1 Combine like terms: -1 + 1 = 0 0 + x = -4.242640687 + 1 x = -4.242640687 + 1 Combine like terms: -4.242640687 + 1 = -3.242640687 x = -3.242640687 Simplifying x = -3.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.242640687, -3.242640687}

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