4x(4x-1)=5

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Solution for 4x(4x-1)=5 equation:


Simplifying
4x(4x + -1) = 5

Reorder the terms:
4x(-1 + 4x) = 5
(-1 * 4x + 4x * 4x) = 5
(-4x + 16x2) = 5

Solving
-4x + 16x2 = 5

Solving for variable 'x'.

Reorder the terms:
-5 + -4x + 16x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -4x + 16x2 = 0

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

Divide each side by '16'.
-0.3125 + -0.25x + x2 = 0

Move the constant term to the right:

Add '0.3125' to each side of the equation.
-0.3125 + -0.25x + 0.3125 + x2 = 0 + 0.3125

Reorder the terms:
-0.3125 + 0.3125 + -0.25x + x2 = 0 + 0.3125

Combine like terms: -0.3125 + 0.3125 = 0.0000
0.0000 + -0.25x + x2 = 0 + 0.3125
-0.25x + x2 = 0 + 0.3125

Combine like terms: 0 + 0.3125 = 0.3125
-0.25x + x2 = 0.3125

The x term is -0.25x.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25x + 0.015625 + x2 = 0.3125 + 0.015625

Reorder the terms:
0.015625 + -0.25x + x2 = 0.3125 + 0.015625

Combine like terms: 0.3125 + 0.015625 = 0.328125
0.015625 + -0.25x + x2 = 0.328125

Factor a perfect square on the left side:
(x + -0.125)(x + -0.125) = 0.328125

Calculate the square root of the right side: 0.572821962

Break this problem into two subproblems by setting 
(x + -0.125) equal to 0.572821962 and -0.572821962.

Subproblem 1

x + -0.125 = 0.572821962 Simplifying x + -0.125 = 0.572821962 Reorder the terms: -0.125 + x = 0.572821962 Solving -0.125 + x = 0.572821962 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = 0.572821962 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = 0.572821962 + 0.125 x = 0.572821962 + 0.125 Combine like terms: 0.572821962 + 0.125 = 0.697821962 x = 0.697821962 Simplifying x = 0.697821962

Subproblem 2

x + -0.125 = -0.572821962 Simplifying x + -0.125 = -0.572821962 Reorder the terms: -0.125 + x = -0.572821962 Solving -0.125 + x = -0.572821962 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = -0.572821962 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = -0.572821962 + 0.125 x = -0.572821962 + 0.125 Combine like terms: -0.572821962 + 0.125 = -0.447821962 x = -0.447821962 Simplifying x = -0.447821962

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.697821962, -0.447821962}

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