x^2-22x=40

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Solution for x^2-22x=40 equation:


Simplifying
x2 + -22x = 40

Reorder the terms:
-22x + x2 = 40

Solving
-22x + x2 = 40

Solving for variable 'x'.

Reorder the terms:
-40 + -22x + x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-40 + -22x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -22x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + -22x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -22x + x2 = 0 + 40
-22x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
-22x + x2 = 40

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 = 40 + 121

Reorder the terms:
121 + -22x + x2 = 40 + 121

Combine like terms: 40 + 121 = 161
121 + -22x + x2 = 161

Factor a perfect square on the left side:
(x + -11)(x + -11) = 161

Calculate the square root of the right side: 12.68857754

Break this problem into two subproblems by setting 
(x + -11) equal to 12.68857754 and -12.68857754.

Subproblem 1

x + -11 = 12.68857754 Simplifying x + -11 = 12.68857754 Reorder the terms: -11 + x = 12.68857754 Solving -11 + x = 12.68857754 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 = 12.68857754 + 11 Combine like terms: -11 + 11 = 0 0 + x = 12.68857754 + 11 x = 12.68857754 + 11 Combine like terms: 12.68857754 + 11 = 23.68857754 x = 23.68857754 Simplifying x = 23.68857754

Subproblem 2

x + -11 = -12.68857754 Simplifying x + -11 = -12.68857754 Reorder the terms: -11 + x = -12.68857754 Solving -11 + x = -12.68857754 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 = -12.68857754 + 11 Combine like terms: -11 + 11 = 0 0 + x = -12.68857754 + 11 x = -12.68857754 + 11 Combine like terms: -12.68857754 + 11 = -1.68857754 x = -1.68857754 Simplifying x = -1.68857754

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.68857754, -1.68857754}

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