0=x^2-22x-25

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Solution for 0=x^2-22x-25 equation:


Simplifying
0 = x2 + -22x + -25

Reorder the terms:
0 = -25 + -22x + x2

Solving
0 = -25 + -22x + x2

Solving for variable 'x'.

Combine like terms: 0 + 25 = 25
25 + 22x + -1x2 = -25 + -22x + x2 + 25 + 22x + -1x2

Reorder the terms:
25 + 22x + -1x2 = -25 + 25 + -22x + 22x + x2 + -1x2

Combine like terms: -25 + 25 = 0
25 + 22x + -1x2 = 0 + -22x + 22x + x2 + -1x2
25 + 22x + -1x2 = -22x + 22x + x2 + -1x2

Combine like terms: -22x + 22x = 0
25 + 22x + -1x2 = 0 + x2 + -1x2
25 + 22x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
25 + 22x + -1x2 = 0

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

Divide each side by '-1'.
-25 + -22x + x2 = 0

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + -22x + 25 + x2 = 0 + 25

Reorder the terms:
-25 + 25 + -22x + x2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + -22x + x2 = 0 + 25
-22x + x2 = 0 + 25

Combine like terms: 0 + 25 = 25
-22x + x2 = 25

The x term is -22x.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22x + 121 + x2 = 25 + 121

Reorder the terms:
121 + -22x + x2 = 25 + 121

Combine like terms: 25 + 121 = 146
121 + -22x + x2 = 146

Factor a perfect square on the left side:
(x + -11)(x + -11) = 146

Calculate the square root of the right side: 12.083045974

Break this problem into two subproblems by setting 
(x + -11) equal to 12.083045974 and -12.083045974.

Subproblem 1

x + -11 = 12.083045974 Simplifying x + -11 = 12.083045974 Reorder the terms: -11 + x = 12.083045974 Solving -11 + x = 12.083045974 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 12.083045974 + 11 Combine like terms: -11 + 11 = 0 0 + x = 12.083045974 + 11 x = 12.083045974 + 11 Combine like terms: 12.083045974 + 11 = 23.083045974 x = 23.083045974 Simplifying x = 23.083045974

Subproblem 2

x + -11 = -12.083045974 Simplifying x + -11 = -12.083045974 Reorder the terms: -11 + x = -12.083045974 Solving -11 + x = -12.083045974 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = -12.083045974 + 11 Combine like terms: -11 + 11 = 0 0 + x = -12.083045974 + 11 x = -12.083045974 + 11 Combine like terms: -12.083045974 + 11 = -1.083045974 x = -1.083045974 Simplifying x = -1.083045974

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.083045974, -1.083045974}

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