x^2-40x+181=0

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Solution for x^2-40x+181=0 equation:


Simplifying
x2 + -40x + 181 = 0

Reorder the terms:
181 + -40x + x2 = 0

Solving
181 + -40x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-181' to each side of the equation.
181 + -40x + -181 + x2 = 0 + -181

Reorder the terms:
181 + -181 + -40x + x2 = 0 + -181

Combine like terms: 181 + -181 = 0
0 + -40x + x2 = 0 + -181
-40x + x2 = 0 + -181

Combine like terms: 0 + -181 = -181
-40x + x2 = -181

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = -181 + 400

Reorder the terms:
400 + -40x + x2 = -181 + 400

Combine like terms: -181 + 400 = 219
400 + -40x + x2 = 219

Factor a perfect square on the left side:
(x + -20)(x + -20) = 219

Calculate the square root of the right side: 14.798648587

Break this problem into two subproblems by setting 
(x + -20) equal to 14.798648587 and -14.798648587.

Subproblem 1

x + -20 = 14.798648587 Simplifying x + -20 = 14.798648587 Reorder the terms: -20 + x = 14.798648587 Solving -20 + x = 14.798648587 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = 14.798648587 + 20 Combine like terms: -20 + 20 = 0 0 + x = 14.798648587 + 20 x = 14.798648587 + 20 Combine like terms: 14.798648587 + 20 = 34.798648587 x = 34.798648587 Simplifying x = 34.798648587

Subproblem 2

x + -20 = -14.798648587 Simplifying x + -20 = -14.798648587 Reorder the terms: -20 + x = -14.798648587 Solving -20 + x = -14.798648587 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = -14.798648587 + 20 Combine like terms: -20 + 20 = 0 0 + x = -14.798648587 + 20 x = -14.798648587 + 20 Combine like terms: -14.798648587 + 20 = 5.201351413 x = 5.201351413 Simplifying x = 5.201351413

Solution

The solution to the problem is based on the solutions from the subproblems. x = {34.798648587, 5.201351413}

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