x^2-40x+325=0

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Solution for x^2-40x+325=0 equation:


Simplifying
x2 + -40x + 325 = 0

Reorder the terms:
325 + -40x + x2 = 0

Solving
325 + -40x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-325' to each side of the equation.
325 + -40x + -325 + x2 = 0 + -325

Reorder the terms:
325 + -325 + -40x + x2 = 0 + -325

Combine like terms: 325 + -325 = 0
0 + -40x + x2 = 0 + -325
-40x + x2 = 0 + -325

Combine like terms: 0 + -325 = -325
-40x + x2 = -325

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 = -325 + 400

Reorder the terms:
400 + -40x + x2 = -325 + 400

Combine like terms: -325 + 400 = 75
400 + -40x + x2 = 75

Factor a perfect square on the left side:
(x + -20)(x + -20) = 75

Calculate the square root of the right side: 8.660254038

Break this problem into two subproblems by setting 
(x + -20) equal to 8.660254038 and -8.660254038.

Subproblem 1

x + -20 = 8.660254038 Simplifying x + -20 = 8.660254038 Reorder the terms: -20 + x = 8.660254038 Solving -20 + x = 8.660254038 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 = 8.660254038 + 20 Combine like terms: -20 + 20 = 0 0 + x = 8.660254038 + 20 x = 8.660254038 + 20 Combine like terms: 8.660254038 + 20 = 28.660254038 x = 28.660254038 Simplifying x = 28.660254038

Subproblem 2

x + -20 = -8.660254038 Simplifying x + -20 = -8.660254038 Reorder the terms: -20 + x = -8.660254038 Solving -20 + x = -8.660254038 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 = -8.660254038 + 20 Combine like terms: -20 + 20 = 0 0 + x = -8.660254038 + 20 x = -8.660254038 + 20 Combine like terms: -8.660254038 + 20 = 11.339745962 x = 11.339745962 Simplifying x = 11.339745962

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.660254038, 11.339745962}

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