36x^2-49x-9=0

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Solution for 36x^2-49x-9=0 equation:


Simplifying
36x2 + -49x + -9 = 0

Reorder the terms:
-9 + -49x + 36x2 = 0

Solving
-9 + -49x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-0.25 + -1.361111111x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -1.361111111x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -1.361111111x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -1.361111111x + x2 = 0 + 0.25
-1.361111111x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-1.361111111x + x2 = 0.25

The x term is -1.361111111x.  Take half its coefficient (-0.6805555555).
Square it (0.4631558641) and add it to both sides.

Add '0.4631558641' to each side of the equation.
-1.361111111x + 0.4631558641 + x2 = 0.25 + 0.4631558641

Reorder the terms:
0.4631558641 + -1.361111111x + x2 = 0.25 + 0.4631558641

Combine like terms: 0.25 + 0.4631558641 = 0.7131558641
0.4631558641 + -1.361111111x + x2 = 0.7131558641

Factor a perfect square on the left side:
(x + -0.6805555555)(x + -0.6805555555) = 0.7131558641

Calculate the square root of the right side: 0.844485562

Break this problem into two subproblems by setting 
(x + -0.6805555555) equal to 0.844485562 and -0.844485562.

Subproblem 1

x + -0.6805555555 = 0.844485562 Simplifying x + -0.6805555555 = 0.844485562 Reorder the terms: -0.6805555555 + x = 0.844485562 Solving -0.6805555555 + x = 0.844485562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6805555555' to each side of the equation. -0.6805555555 + 0.6805555555 + x = 0.844485562 + 0.6805555555 Combine like terms: -0.6805555555 + 0.6805555555 = 0.0000000000 0.0000000000 + x = 0.844485562 + 0.6805555555 x = 0.844485562 + 0.6805555555 Combine like terms: 0.844485562 + 0.6805555555 = 1.5250411175 x = 1.5250411175 Simplifying x = 1.5250411175

Subproblem 2

x + -0.6805555555 = -0.844485562 Simplifying x + -0.6805555555 = -0.844485562 Reorder the terms: -0.6805555555 + x = -0.844485562 Solving -0.6805555555 + x = -0.844485562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6805555555' to each side of the equation. -0.6805555555 + 0.6805555555 + x = -0.844485562 + 0.6805555555 Combine like terms: -0.6805555555 + 0.6805555555 = 0.0000000000 0.0000000000 + x = -0.844485562 + 0.6805555555 x = -0.844485562 + 0.6805555555 Combine like terms: -0.844485562 + 0.6805555555 = -0.1639300065 x = -0.1639300065 Simplifying x = -0.1639300065

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5250411175, -0.1639300065}

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