64x^2+9x-9=0

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Solution for 64x^2+9x-9=0 equation:


Simplifying
64x2 + 9x + -9 = 0

Reorder the terms:
-9 + 9x + 64x2 = 0

Solving
-9 + 9x + 64x2 = 0

Solving for variable 'x'.

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

Divide each side by '64'.
-0.140625 + 0.140625x + x2 = 0

Move the constant term to the right:

Add '0.140625' to each side of the equation.
-0.140625 + 0.140625x + 0.140625 + x2 = 0 + 0.140625

Reorder the terms:
-0.140625 + 0.140625 + 0.140625x + x2 = 0 + 0.140625

Combine like terms: -0.140625 + 0.140625 = 0.000000
0.000000 + 0.140625x + x2 = 0 + 0.140625
0.140625x + x2 = 0 + 0.140625

Combine like terms: 0 + 0.140625 = 0.140625
0.140625x + x2 = 0.140625

The x term is 0.140625x.  Take half its coefficient (0.0703125).
Square it (0.004943847656) and add it to both sides.

Add '0.004943847656' to each side of the equation.
0.140625x + 0.004943847656 + x2 = 0.140625 + 0.004943847656

Reorder the terms:
0.004943847656 + 0.140625x + x2 = 0.140625 + 0.004943847656

Combine like terms: 0.140625 + 0.004943847656 = 0.145568847656
0.004943847656 + 0.140625x + x2 = 0.145568847656

Factor a perfect square on the left side:
(x + 0.0703125)(x + 0.0703125) = 0.145568847656

Calculate the square root of the right side: 0.381534858

Break this problem into two subproblems by setting 
(x + 0.0703125) equal to 0.381534858 and -0.381534858.

Subproblem 1

x + 0.0703125 = 0.381534858 Simplifying x + 0.0703125 = 0.381534858 Reorder the terms: 0.0703125 + x = 0.381534858 Solving 0.0703125 + x = 0.381534858 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0703125' to each side of the equation. 0.0703125 + -0.0703125 + x = 0.381534858 + -0.0703125 Combine like terms: 0.0703125 + -0.0703125 = 0.0000000 0.0000000 + x = 0.381534858 + -0.0703125 x = 0.381534858 + -0.0703125 Combine like terms: 0.381534858 + -0.0703125 = 0.311222358 x = 0.311222358 Simplifying x = 0.311222358

Subproblem 2

x + 0.0703125 = -0.381534858 Simplifying x + 0.0703125 = -0.381534858 Reorder the terms: 0.0703125 + x = -0.381534858 Solving 0.0703125 + x = -0.381534858 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0703125' to each side of the equation. 0.0703125 + -0.0703125 + x = -0.381534858 + -0.0703125 Combine like terms: 0.0703125 + -0.0703125 = 0.0000000 0.0000000 + x = -0.381534858 + -0.0703125 x = -0.381534858 + -0.0703125 Combine like terms: -0.381534858 + -0.0703125 = -0.451847358 x = -0.451847358 Simplifying x = -0.451847358

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.311222358, -0.451847358}

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