x^2-82x+8=0

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Solution for x^2-82x+8=0 equation:


Simplifying
x2 + -82x + 8 = 0

Reorder the terms:
8 + -82x + x2 = 0

Solving
8 + -82x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -82x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + -82x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -82x + x2 = 0 + -8
-82x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
-82x + x2 = -8

The x term is -82x.  Take half its coefficient (-41).
Square it (1681) and add it to both sides.

Add '1681' to each side of the equation.
-82x + 1681 + x2 = -8 + 1681

Reorder the terms:
1681 + -82x + x2 = -8 + 1681

Combine like terms: -8 + 1681 = 1673
1681 + -82x + x2 = 1673

Factor a perfect square on the left side:
(x + -41)(x + -41) = 1673

Calculate the square root of the right side: 40.902322672

Break this problem into two subproblems by setting 
(x + -41) equal to 40.902322672 and -40.902322672.

Subproblem 1

x + -41 = 40.902322672 Simplifying x + -41 = 40.902322672 Reorder the terms: -41 + x = 40.902322672 Solving -41 + x = 40.902322672 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '41' to each side of the equation. -41 + 41 + x = 40.902322672 + 41 Combine like terms: -41 + 41 = 0 0 + x = 40.902322672 + 41 x = 40.902322672 + 41 Combine like terms: 40.902322672 + 41 = 81.902322672 x = 81.902322672 Simplifying x = 81.902322672

Subproblem 2

x + -41 = -40.902322672 Simplifying x + -41 = -40.902322672 Reorder the terms: -41 + x = -40.902322672 Solving -41 + x = -40.902322672 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '41' to each side of the equation. -41 + 41 + x = -40.902322672 + 41 Combine like terms: -41 + 41 = 0 0 + x = -40.902322672 + 41 x = -40.902322672 + 41 Combine like terms: -40.902322672 + 41 = 0.097677328 x = 0.097677328 Simplifying x = 0.097677328

Solution

The solution to the problem is based on the solutions from the subproblems. x = {81.902322672, 0.097677328}

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