2x^2-36x=1

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Solution for 2x^2-36x=1 equation:


Simplifying
2x2 + -36x = 1

Reorder the terms:
-36x + 2x2 = 1

Solving
-36x + 2x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + -36x + 2x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -36x + 2x2 = 0

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

Divide each side by '2'.
-0.5 + -18x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -18x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -18x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -18x + x2 = 0 + 0.5
-18x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-18x + x2 = 0.5

The x term is -18x.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18x + 81 + x2 = 0.5 + 81

Reorder the terms:
81 + -18x + x2 = 0.5 + 81

Combine like terms: 0.5 + 81 = 81.5
81 + -18x + x2 = 81.5

Factor a perfect square on the left side:
(x + -9)(x + -9) = 81.5

Calculate the square root of the right side: 9.027735043

Break this problem into two subproblems by setting 
(x + -9) equal to 9.027735043 and -9.027735043.

Subproblem 1

x + -9 = 9.027735043 Simplifying x + -9 = 9.027735043 Reorder the terms: -9 + x = 9.027735043 Solving -9 + x = 9.027735043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = 9.027735043 + 9 Combine like terms: -9 + 9 = 0 0 + x = 9.027735043 + 9 x = 9.027735043 + 9 Combine like terms: 9.027735043 + 9 = 18.027735043 x = 18.027735043 Simplifying x = 18.027735043

Subproblem 2

x + -9 = -9.027735043 Simplifying x + -9 = -9.027735043 Reorder the terms: -9 + x = -9.027735043 Solving -9 + x = -9.027735043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = -9.027735043 + 9 Combine like terms: -9 + 9 = 0 0 + x = -9.027735043 + 9 x = -9.027735043 + 9 Combine like terms: -9.027735043 + 9 = -0.027735043 x = -0.027735043 Simplifying x = -0.027735043

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.027735043, -0.027735043}

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