85x^2-35x-23=0

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Solution for 85x^2-35x-23=0 equation:


Simplifying
85x2 + -35x + -23 = 0

Reorder the terms:
-23 + -35x + 85x2 = 0

Solving
-23 + -35x + 85x2 = 0

Solving for variable 'x'.

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

Divide each side by '85'.
-0.2705882353 + -0.4117647059x + x2 = 0

Move the constant term to the right:

Add '0.2705882353' to each side of the equation.
-0.2705882353 + -0.4117647059x + 0.2705882353 + x2 = 0 + 0.2705882353

Reorder the terms:
-0.2705882353 + 0.2705882353 + -0.4117647059x + x2 = 0 + 0.2705882353

Combine like terms: -0.2705882353 + 0.2705882353 = 0.0000000000
0.0000000000 + -0.4117647059x + x2 = 0 + 0.2705882353
-0.4117647059x + x2 = 0 + 0.2705882353

Combine like terms: 0 + 0.2705882353 = 0.2705882353
-0.4117647059x + x2 = 0.2705882353

The x term is -0.4117647059x.  Take half its coefficient (-0.205882353).
Square it (0.04238754328) and add it to both sides.

Add '0.04238754328' to each side of the equation.
-0.4117647059x + 0.04238754328 + x2 = 0.2705882353 + 0.04238754328

Reorder the terms:
0.04238754328 + -0.4117647059x + x2 = 0.2705882353 + 0.04238754328

Combine like terms: 0.2705882353 + 0.04238754328 = 0.31297577858
0.04238754328 + -0.4117647059x + x2 = 0.31297577858

Factor a perfect square on the left side:
(x + -0.205882353)(x + -0.205882353) = 0.31297577858

Calculate the square root of the right side: 0.559442382

Break this problem into two subproblems by setting 
(x + -0.205882353) equal to 0.559442382 and -0.559442382.

Subproblem 1

x + -0.205882353 = 0.559442382 Simplifying x + -0.205882353 = 0.559442382 Reorder the terms: -0.205882353 + x = 0.559442382 Solving -0.205882353 + x = 0.559442382 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.205882353' to each side of the equation. -0.205882353 + 0.205882353 + x = 0.559442382 + 0.205882353 Combine like terms: -0.205882353 + 0.205882353 = 0.000000000 0.000000000 + x = 0.559442382 + 0.205882353 x = 0.559442382 + 0.205882353 Combine like terms: 0.559442382 + 0.205882353 = 0.765324735 x = 0.765324735 Simplifying x = 0.765324735

Subproblem 2

x + -0.205882353 = -0.559442382 Simplifying x + -0.205882353 = -0.559442382 Reorder the terms: -0.205882353 + x = -0.559442382 Solving -0.205882353 + x = -0.559442382 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.205882353' to each side of the equation. -0.205882353 + 0.205882353 + x = -0.559442382 + 0.205882353 Combine like terms: -0.205882353 + 0.205882353 = 0.000000000 0.000000000 + x = -0.559442382 + 0.205882353 x = -0.559442382 + 0.205882353 Combine like terms: -0.559442382 + 0.205882353 = -0.353560029 x = -0.353560029 Simplifying x = -0.353560029

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.765324735, -0.353560029}

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