64x^2-5x-11=0

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Solution for 64x^2-5x-11=0 equation:


Simplifying
64x2 + -5x + -11 = 0

Reorder the terms:
-11 + -5x + 64x2 = 0

Solving
-11 + -5x + 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'.
-0.171875 + -0.078125x + x2 = 0

Move the constant term to the right:

Add '0.171875' to each side of the equation.
-0.171875 + -0.078125x + 0.171875 + x2 = 0 + 0.171875

Reorder the terms:
-0.171875 + 0.171875 + -0.078125x + x2 = 0 + 0.171875

Combine like terms: -0.171875 + 0.171875 = 0.000000
0.000000 + -0.078125x + x2 = 0 + 0.171875
-0.078125x + x2 = 0 + 0.171875

Combine like terms: 0 + 0.171875 = 0.171875
-0.078125x + x2 = 0.171875

The x term is -0.078125x.  Take half its coefficient (-0.0390625).
Square it (0.001525878906) and add it to both sides.

Add '0.001525878906' to each side of the equation.
-0.078125x + 0.001525878906 + x2 = 0.171875 + 0.001525878906

Reorder the terms:
0.001525878906 + -0.078125x + x2 = 0.171875 + 0.001525878906

Combine like terms: 0.171875 + 0.001525878906 = 0.173400878906
0.001525878906 + -0.078125x + x2 = 0.173400878906

Factor a perfect square on the left side:
(x + -0.0390625)(x + -0.0390625) = 0.173400878906

Calculate the square root of the right side: 0.416414312

Break this problem into two subproblems by setting 
(x + -0.0390625) equal to 0.416414312 and -0.416414312.

Subproblem 1

x + -0.0390625 = 0.416414312 Simplifying x + -0.0390625 = 0.416414312 Reorder the terms: -0.0390625 + x = 0.416414312 Solving -0.0390625 + x = 0.416414312 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0390625' to each side of the equation. -0.0390625 + 0.0390625 + x = 0.416414312 + 0.0390625 Combine like terms: -0.0390625 + 0.0390625 = 0.0000000 0.0000000 + x = 0.416414312 + 0.0390625 x = 0.416414312 + 0.0390625 Combine like terms: 0.416414312 + 0.0390625 = 0.455476812 x = 0.455476812 Simplifying x = 0.455476812

Subproblem 2

x + -0.0390625 = -0.416414312 Simplifying x + -0.0390625 = -0.416414312 Reorder the terms: -0.0390625 + x = -0.416414312 Solving -0.0390625 + x = -0.416414312 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0390625' to each side of the equation. -0.0390625 + 0.0390625 + x = -0.416414312 + 0.0390625 Combine like terms: -0.0390625 + 0.0390625 = 0.0000000 0.0000000 + x = -0.416414312 + 0.0390625 x = -0.416414312 + 0.0390625 Combine like terms: -0.416414312 + 0.0390625 = -0.377351812 x = -0.377351812 Simplifying x = -0.377351812

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.455476812, -0.377351812}

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