7x(6x+6)=1

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Solution for 7x(6x+6)=1 equation:


Simplifying
7x(6x + 6) = 1

Reorder the terms:
7x(6 + 6x) = 1
(6 * 7x + 6x * 7x) = 1
(42x + 42x2) = 1

Solving
42x + 42x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + 42x + 42x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 42x + 42x2 = 0

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

Divide each side by '42'.
-0.02380952381 + x + x2 = 0

Move the constant term to the right:

Add '0.02380952381' to each side of the equation.
-0.02380952381 + x + 0.02380952381 + x2 = 0 + 0.02380952381

Reorder the terms:
-0.02380952381 + 0.02380952381 + x + x2 = 0 + 0.02380952381

Combine like terms: -0.02380952381 + 0.02380952381 = 0.00000000000
0.00000000000 + x + x2 = 0 + 0.02380952381
x + x2 = 0 + 0.02380952381

Combine like terms: 0 + 0.02380952381 = 0.02380952381
x + x2 = 0.02380952381

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 0.02380952381 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 0.02380952381 + 0.25

Combine like terms: 0.02380952381 + 0.25 = 0.27380952381
1.25 + x2 = 0.27380952381

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.27380952381

Calculate the square root of the right side: 0.523268118

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.523268118 and -0.523268118.

Subproblem 1

x + 0.5 = 0.523268118 Simplifying x + 0.5 = 0.523268118 Reorder the terms: 0.5 + x = 0.523268118 Solving 0.5 + x = 0.523268118 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.523268118 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.523268118 + -0.5 x = 0.523268118 + -0.5 Combine like terms: 0.523268118 + -0.5 = 0.023268118 x = 0.023268118 Simplifying x = 0.023268118

Subproblem 2

x + 0.5 = -0.523268118 Simplifying x + 0.5 = -0.523268118 Reorder the terms: 0.5 + x = -0.523268118 Solving 0.5 + x = -0.523268118 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.523268118 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.523268118 + -0.5 x = -0.523268118 + -0.5 Combine like terms: -0.523268118 + -0.5 = -1.023268118 x = -1.023268118 Simplifying x = -1.023268118

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.023268118, -1.023268118}

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