36x^2-65x-1=0

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Solution for 36x^2-65x-1=0 equation:


Simplifying
36x2 + -65x + -1 = 0

Reorder the terms:
-1 + -65x + 36x2 = 0

Solving
-1 + -65x + 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'.
-0.02777777778 + -1.805555556x + x2 = 0

Move the constant term to the right:

Add '0.02777777778' to each side of the equation.
-0.02777777778 + -1.805555556x + 0.02777777778 + x2 = 0 + 0.02777777778

Reorder the terms:
-0.02777777778 + 0.02777777778 + -1.805555556x + x2 = 0 + 0.02777777778

Combine like terms: -0.02777777778 + 0.02777777778 = 0.00000000000
0.00000000000 + -1.805555556x + x2 = 0 + 0.02777777778
-1.805555556x + x2 = 0 + 0.02777777778

Combine like terms: 0 + 0.02777777778 = 0.02777777778
-1.805555556x + x2 = 0.02777777778

The x term is -1.805555556x.  Take half its coefficient (-0.902777778).
Square it (0.8150077165) and add it to both sides.

Add '0.8150077165' to each side of the equation.
-1.805555556x + 0.8150077165 + x2 = 0.02777777778 + 0.8150077165

Reorder the terms:
0.8150077165 + -1.805555556x + x2 = 0.02777777778 + 0.8150077165

Combine like terms: 0.02777777778 + 0.8150077165 = 0.84278549428
0.8150077165 + -1.805555556x + x2 = 0.84278549428

Factor a perfect square on the left side:
(x + -0.902777778)(x + -0.902777778) = 0.84278549428

Calculate the square root of the right side: 0.918033493

Break this problem into two subproblems by setting 
(x + -0.902777778) equal to 0.918033493 and -0.918033493.

Subproblem 1

x + -0.902777778 = 0.918033493 Simplifying x + -0.902777778 = 0.918033493 Reorder the terms: -0.902777778 + x = 0.918033493 Solving -0.902777778 + x = 0.918033493 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.902777778' to each side of the equation. -0.902777778 + 0.902777778 + x = 0.918033493 + 0.902777778 Combine like terms: -0.902777778 + 0.902777778 = 0.000000000 0.000000000 + x = 0.918033493 + 0.902777778 x = 0.918033493 + 0.902777778 Combine like terms: 0.918033493 + 0.902777778 = 1.820811271 x = 1.820811271 Simplifying x = 1.820811271

Subproblem 2

x + -0.902777778 = -0.918033493 Simplifying x + -0.902777778 = -0.918033493 Reorder the terms: -0.902777778 + x = -0.918033493 Solving -0.902777778 + x = -0.918033493 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.902777778' to each side of the equation. -0.902777778 + 0.902777778 + x = -0.918033493 + 0.902777778 Combine like terms: -0.902777778 + 0.902777778 = 0.000000000 0.000000000 + x = -0.918033493 + 0.902777778 x = -0.918033493 + 0.902777778 Combine like terms: -0.918033493 + 0.902777778 = -0.015255715 x = -0.015255715 Simplifying x = -0.015255715

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.820811271, -0.015255715}

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