4x(4+6x)=8-5

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Solution for 4x(4+6x)=8-5 equation:


Simplifying
4x(4 + 6x) = 8 + -5
(4 * 4x + 6x * 4x) = 8 + -5
(16x + 24x2) = 8 + -5

Combine like terms: 8 + -5 = 3
16x + 24x2 = 3

Solving
16x + 24x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + 16x + 24x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 16x + 24x2 = 0

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

Divide each side by '24'.
-0.125 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + 0.6666666667x + 0.125 + x2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + 0.6666666667x + x2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + 0.6666666667x + x2 = 0 + 0.125
0.6666666667x + x2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
0.6666666667x + x2 = 0.125

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 0.125 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 0.125 + 0.1111111112

Combine like terms: 0.125 + 0.1111111112 = 0.2361111112
0.1111111112 + 0.6666666667x + x2 = 0.2361111112

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 0.2361111112

Calculate the square root of the right side: 0.485912658

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 0.485912658 and -0.485912658.

Subproblem 1

x + 0.3333333334 = 0.485912658 Simplifying x + 0.3333333334 = 0.485912658 Reorder the terms: 0.3333333334 + x = 0.485912658 Solving 0.3333333334 + x = 0.485912658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 0.485912658 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 0.485912658 + -0.3333333334 x = 0.485912658 + -0.3333333334 Combine like terms: 0.485912658 + -0.3333333334 = 0.1525793246 x = 0.1525793246 Simplifying x = 0.1525793246

Subproblem 2

x + 0.3333333334 = -0.485912658 Simplifying x + 0.3333333334 = -0.485912658 Reorder the terms: 0.3333333334 + x = -0.485912658 Solving 0.3333333334 + x = -0.485912658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -0.485912658 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -0.485912658 + -0.3333333334 x = -0.485912658 + -0.3333333334 Combine like terms: -0.485912658 + -0.3333333334 = -0.8192459914 x = -0.8192459914 Simplifying x = -0.8192459914

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.1525793246, -0.8192459914}

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