36x^2-24x=85

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Solution for 36x^2-24x=85 equation:


Simplifying
36x2 + -24x = 85

Reorder the terms:
-24x + 36x2 = 85

Solving
-24x + 36x2 = 85

Solving for variable 'x'.

Reorder the terms:
-85 + -24x + 36x2 = 85 + -85

Combine like terms: 85 + -85 = 0
-85 + -24x + 36x2 = 0

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

Divide each side by '36'.
-2.361111111 + -0.6666666667x + x2 = 0

Move the constant term to the right:

Add '2.361111111' to each side of the equation.
-2.361111111 + -0.6666666667x + 2.361111111 + x2 = 0 + 2.361111111

Reorder the terms:
-2.361111111 + 2.361111111 + -0.6666666667x + x2 = 0 + 2.361111111

Combine like terms: -2.361111111 + 2.361111111 = 0.000000000
0.000000000 + -0.6666666667x + x2 = 0 + 2.361111111
-0.6666666667x + x2 = 0 + 2.361111111

Combine like terms: 0 + 2.361111111 = 2.361111111
-0.6666666667x + x2 = 2.361111111

The x term is -0.6666666667x.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667x + 0.1111111112 + x2 = 2.361111111 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667x + x2 = 2.361111111 + 0.1111111112

Combine like terms: 2.361111111 + 0.1111111112 = 2.4722222222
0.1111111112 + -0.6666666667x + x2 = 2.4722222222

Factor a perfect square on the left side:
(x + -0.3333333334)(x + -0.3333333334) = 2.4722222222

Calculate the square root of the right side: 1.572330189

Break this problem into two subproblems by setting 
(x + -0.3333333334) equal to 1.572330189 and -1.572330189.

Subproblem 1

x + -0.3333333334 = 1.572330189 Simplifying x + -0.3333333334 = 1.572330189 Reorder the terms: -0.3333333334 + x = 1.572330189 Solving -0.3333333334 + x = 1.572330189 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = 1.572330189 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = 1.572330189 + 0.3333333334 x = 1.572330189 + 0.3333333334 Combine like terms: 1.572330189 + 0.3333333334 = 1.9056635224 x = 1.9056635224 Simplifying x = 1.9056635224

Subproblem 2

x + -0.3333333334 = -1.572330189 Simplifying x + -0.3333333334 = -1.572330189 Reorder the terms: -0.3333333334 + x = -1.572330189 Solving -0.3333333334 + x = -1.572330189 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = -1.572330189 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = -1.572330189 + 0.3333333334 x = -1.572330189 + 0.3333333334 Combine like terms: -1.572330189 + 0.3333333334 = -1.2389968556 x = -1.2389968556 Simplifying x = -1.2389968556

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.9056635224, -1.2389968556}

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