9x^2-5x-540=0

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Solution for 9x^2-5x-540=0 equation:


Simplifying
9x2 + -5x + -540 = 0

Reorder the terms:
-540 + -5x + 9x2 = 0

Solving
-540 + -5x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-60 + -0.5555555556x + x2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -0.5555555556x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + -0.5555555556x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -0.5555555556x + x2 = 0 + 60
-0.5555555556x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
-0.5555555556x + x2 = 60

The x term is -0.5555555556x.  Take half its coefficient (-0.2777777778).
Square it (0.07716049384) and add it to both sides.

Add '0.07716049384' to each side of the equation.
-0.5555555556x + 0.07716049384 + x2 = 60 + 0.07716049384

Reorder the terms:
0.07716049384 + -0.5555555556x + x2 = 60 + 0.07716049384

Combine like terms: 60 + 0.07716049384 = 60.07716049384
0.07716049384 + -0.5555555556x + x2 = 60.07716049384

Factor a perfect square on the left side:
(x + -0.2777777778)(x + -0.2777777778) = 60.07716049384

Calculate the square root of the right side: 7.750945781

Break this problem into two subproblems by setting 
(x + -0.2777777778) equal to 7.750945781 and -7.750945781.

Subproblem 1

x + -0.2777777778 = 7.750945781 Simplifying x + -0.2777777778 = 7.750945781 Reorder the terms: -0.2777777778 + x = 7.750945781 Solving -0.2777777778 + x = 7.750945781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2777777778' to each side of the equation. -0.2777777778 + 0.2777777778 + x = 7.750945781 + 0.2777777778 Combine like terms: -0.2777777778 + 0.2777777778 = 0.0000000000 0.0000000000 + x = 7.750945781 + 0.2777777778 x = 7.750945781 + 0.2777777778 Combine like terms: 7.750945781 + 0.2777777778 = 8.0287235588 x = 8.0287235588 Simplifying x = 8.0287235588

Subproblem 2

x + -0.2777777778 = -7.750945781 Simplifying x + -0.2777777778 = -7.750945781 Reorder the terms: -0.2777777778 + x = -7.750945781 Solving -0.2777777778 + x = -7.750945781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2777777778' to each side of the equation. -0.2777777778 + 0.2777777778 + x = -7.750945781 + 0.2777777778 Combine like terms: -0.2777777778 + 0.2777777778 = 0.0000000000 0.0000000000 + x = -7.750945781 + 0.2777777778 x = -7.750945781 + 0.2777777778 Combine like terms: -7.750945781 + 0.2777777778 = -7.4731680032 x = -7.4731680032 Simplifying x = -7.4731680032

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.0287235588, -7.4731680032}

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