64x^2-x-15=0

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Solution for 64x^2-x-15=0 equation:


Simplifying
64x2 + -1x + -15 = 0

Reorder the terms:
-15 + -1x + 64x2 = 0

Solving
-15 + -1x + 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'.
-0.234375 + -0.015625x + x2 = 0

Move the constant term to the right:

Add '0.234375' to each side of the equation.
-0.234375 + -0.015625x + 0.234375 + x2 = 0 + 0.234375

Reorder the terms:
-0.234375 + 0.234375 + -0.015625x + x2 = 0 + 0.234375

Combine like terms: -0.234375 + 0.234375 = 0.000000
0.000000 + -0.015625x + x2 = 0 + 0.234375
-0.015625x + x2 = 0 + 0.234375

Combine like terms: 0 + 0.234375 = 0.234375
-0.015625x + x2 = 0.234375

The x term is -0.015625x.  Take half its coefficient (-0.0078125).
Square it (0.00006103515625) and add it to both sides.

Add '0.00006103515625' to each side of the equation.
-0.015625x + 0.00006103515625 + x2 = 0.234375 + 0.00006103515625

Reorder the terms:
0.00006103515625 + -0.015625x + x2 = 0.234375 + 0.00006103515625

Combine like terms: 0.234375 + 0.00006103515625 = 0.23443603515625
0.00006103515625 + -0.015625x + x2 = 0.23443603515625

Factor a perfect square on the left side:
(x + -0.0078125)(x + -0.0078125) = 0.23443603515625

Calculate the square root of the right side: 0.484185951

Break this problem into two subproblems by setting 
(x + -0.0078125) equal to 0.484185951 and -0.484185951.

Subproblem 1

x + -0.0078125 = 0.484185951 Simplifying x + -0.0078125 = 0.484185951 Reorder the terms: -0.0078125 + x = 0.484185951 Solving -0.0078125 + x = 0.484185951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0078125' to each side of the equation. -0.0078125 + 0.0078125 + x = 0.484185951 + 0.0078125 Combine like terms: -0.0078125 + 0.0078125 = 0.0000000 0.0000000 + x = 0.484185951 + 0.0078125 x = 0.484185951 + 0.0078125 Combine like terms: 0.484185951 + 0.0078125 = 0.491998451 x = 0.491998451 Simplifying x = 0.491998451

Subproblem 2

x + -0.0078125 = -0.484185951 Simplifying x + -0.0078125 = -0.484185951 Reorder the terms: -0.0078125 + x = -0.484185951 Solving -0.0078125 + x = -0.484185951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0078125' to each side of the equation. -0.0078125 + 0.0078125 + x = -0.484185951 + 0.0078125 Combine like terms: -0.0078125 + 0.0078125 = 0.0000000 0.0000000 + x = -0.484185951 + 0.0078125 x = -0.484185951 + 0.0078125 Combine like terms: -0.484185951 + 0.0078125 = -0.476373451 x = -0.476373451 Simplifying x = -0.476373451

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.491998451, -0.476373451}

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