-.111x^2+4x-36=0

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Solution for -.111x^2+4x-36=0 equation:


Simplifying
-0.111x2 + 4x + -36 = 0

Reorder the terms:
-36 + 4x + -0.111x2 = 0

Solving
-36 + 4x + -0.111x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.111 the coefficient of the squared term: 

Divide each side by '-0.111'.
324.3243243 + -36.03603604x + x2 = 0

Move the constant term to the right:

Add '-324.3243243' to each side of the equation.
324.3243243 + -36.03603604x + -324.3243243 + x2 = 0 + -324.3243243

Reorder the terms:
324.3243243 + -324.3243243 + -36.03603604x + x2 = 0 + -324.3243243

Combine like terms: 324.3243243 + -324.3243243 = 0.0000000
0.0000000 + -36.03603604x + x2 = 0 + -324.3243243
-36.03603604x + x2 = 0 + -324.3243243

Combine like terms: 0 + -324.3243243 = -324.3243243
-36.03603604x + x2 = -324.3243243

The x term is -36.03603604x.  Take half its coefficient (-18.01801802).
Square it (324.6489734) and add it to both sides.

Add '324.6489734' to each side of the equation.
-36.03603604x + 324.6489734 + x2 = -324.3243243 + 324.6489734

Reorder the terms:
324.6489734 + -36.03603604x + x2 = -324.3243243 + 324.6489734

Combine like terms: -324.3243243 + 324.6489734 = 0.3246491
324.6489734 + -36.03603604x + x2 = 0.3246491

Factor a perfect square on the left side:
(x + -18.01801802)(x + -18.01801802) = 0.3246491

Calculate the square root of the right side: 0.56977987

Break this problem into two subproblems by setting 
(x + -18.01801802) equal to 0.56977987 and -0.56977987.

Subproblem 1

x + -18.01801802 = 0.56977987 Simplifying x + -18.01801802 = 0.56977987 Reorder the terms: -18.01801802 + x = 0.56977987 Solving -18.01801802 + x = 0.56977987 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18.01801802' to each side of the equation. -18.01801802 + 18.01801802 + x = 0.56977987 + 18.01801802 Combine like terms: -18.01801802 + 18.01801802 = 0.00000000 0.00000000 + x = 0.56977987 + 18.01801802 x = 0.56977987 + 18.01801802 Combine like terms: 0.56977987 + 18.01801802 = 18.58779789 x = 18.58779789 Simplifying x = 18.58779789

Subproblem 2

x + -18.01801802 = -0.56977987 Simplifying x + -18.01801802 = -0.56977987 Reorder the terms: -18.01801802 + x = -0.56977987 Solving -18.01801802 + x = -0.56977987 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18.01801802' to each side of the equation. -18.01801802 + 18.01801802 + x = -0.56977987 + 18.01801802 Combine like terms: -18.01801802 + 18.01801802 = 0.00000000 0.00000000 + x = -0.56977987 + 18.01801802 x = -0.56977987 + 18.01801802 Combine like terms: -0.56977987 + 18.01801802 = 17.44823815 x = 17.44823815 Simplifying x = 17.44823815

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.58779789, 17.44823815}

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